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My problem with infinity

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  • R Rob Philpott

    eh? Jumping? That doesn't exist in the linear fluid world of mathmatics!

    Regards, Rob Philpott.

    S Offline
    S Offline
    soap brain
    wrote on last edited by
    #16

    It doesn't make sense. The point of intersection is not 'at infinity', it's just not defined. Compare it to this.

    1 Reply Last reply
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    • R Rob Philpott

      Woken up plagued by the concept of infinity again. Precursor to a difficult day ahead methinks. Infinity in my mind is that place you never get to. Try counting to infinity and you won't get there. Purists might argue that you would if you spent an infinite amount of time counting. But, seemingly we do get there. The abstraction I have in my head is this: A clock face with a straight line through it, going straight through the 6 and 12 and extending where else, but to infinity. Draw another parallel line to the left of the clock. Then, when the hour hand is on the 9 it points to the nearest point on the second line. As time progresses, the point on the second line moves up, heading straight for infinity. Now by rights, it should never get there, but it does, 3 hours later. It got there I believe at 3 hours - (1/infinity). It's a theoretical place, but it's also real because we just went through it to get to midday. So, where is it? I've expressed my concerns to my wife but she just gives me that slightly desperate lonely look. Oh dear, deep questions about the Universe always leave me feeling edgy.

      Regards, Rob Philpott.

      L Offline
      L Offline
      Lost User
      wrote on last edited by
      #17

      Infinity is not a number therefore by trying to represent it with numbers you are doomed.

      Join the cool kids - Come fold with us[^]

      L 1 Reply Last reply
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      • P peterchen

        You *can* reach infinity by counting - you just have to e.g. permanently double your speed. :cool: Is "Horizon" an equally complicated concept for you?

        Personally, I love the idea that Raymond spends his nights posting bad regexs to mailing lists under the pseudonym of Jane Smith. He'd be like a super hero, only more nerdy and less useful. [Trevel]
        | FoldWithUs! | sighist | µLaunch - program launcher for server core and hyper-v server

        J Offline
        J Offline
        Jorgen Sigvardsson
        wrote on last edited by
        #18

        peterchen wrote:

        *can* reach infinity

        That is a contradiction in terms. Infinity is by definition unreachable...

        -- Kein Mitleid Für Die Mehrheit

        P 1 Reply Last reply
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        • R Rob Philpott

          Woken up plagued by the concept of infinity again. Precursor to a difficult day ahead methinks. Infinity in my mind is that place you never get to. Try counting to infinity and you won't get there. Purists might argue that you would if you spent an infinite amount of time counting. But, seemingly we do get there. The abstraction I have in my head is this: A clock face with a straight line through it, going straight through the 6 and 12 and extending where else, but to infinity. Draw another parallel line to the left of the clock. Then, when the hour hand is on the 9 it points to the nearest point on the second line. As time progresses, the point on the second line moves up, heading straight for infinity. Now by rights, it should never get there, but it does, 3 hours later. It got there I believe at 3 hours - (1/infinity). It's a theoretical place, but it's also real because we just went through it to get to midday. So, where is it? I've expressed my concerns to my wife but she just gives me that slightly desperate lonely look. Oh dear, deep questions about the Universe always leave me feeling edgy.

          Regards, Rob Philpott.

          R Offline
          R Offline
          Rajesh R Subramanian
          wrote on last edited by
          #19

          I've counted till infinity. Cheers, Chuck.

          OriginalGriffO 1 Reply Last reply
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          • R Rob Philpott

            Woken up plagued by the concept of infinity again. Precursor to a difficult day ahead methinks. Infinity in my mind is that place you never get to. Try counting to infinity and you won't get there. Purists might argue that you would if you spent an infinite amount of time counting. But, seemingly we do get there. The abstraction I have in my head is this: A clock face with a straight line through it, going straight through the 6 and 12 and extending where else, but to infinity. Draw another parallel line to the left of the clock. Then, when the hour hand is on the 9 it points to the nearest point on the second line. As time progresses, the point on the second line moves up, heading straight for infinity. Now by rights, it should never get there, but it does, 3 hours later. It got there I believe at 3 hours - (1/infinity). It's a theoretical place, but it's also real because we just went through it to get to midday. So, where is it? I've expressed my concerns to my wife but she just gives me that slightly desperate lonely look. Oh dear, deep questions about the Universe always leave me feeling edgy.

            Regards, Rob Philpott.

            J Offline
            J Offline
            Jorgen Sigvardsson
            wrote on last edited by
            #20

            That's not a problem with infinity, that's a problem with geometry. If you setup two straight line equations for the lines, and solve them for where they intersect, you will see that there is no solution for when the lines are parallel. That's not cheating infinity - it is you who are assuming that the lines will always cross, but the assumption is wrong.

            -- Kein Mitleid Für Die Mehrheit

            R 1 Reply Last reply
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            • R Rob Philpott

              Woken up plagued by the concept of infinity again. Precursor to a difficult day ahead methinks. Infinity in my mind is that place you never get to. Try counting to infinity and you won't get there. Purists might argue that you would if you spent an infinite amount of time counting. But, seemingly we do get there. The abstraction I have in my head is this: A clock face with a straight line through it, going straight through the 6 and 12 and extending where else, but to infinity. Draw another parallel line to the left of the clock. Then, when the hour hand is on the 9 it points to the nearest point on the second line. As time progresses, the point on the second line moves up, heading straight for infinity. Now by rights, it should never get there, but it does, 3 hours later. It got there I believe at 3 hours - (1/infinity). It's a theoretical place, but it's also real because we just went through it to get to midday. So, where is it? I've expressed my concerns to my wife but she just gives me that slightly desperate lonely look. Oh dear, deep questions about the Universe always leave me feeling edgy.

              Regards, Rob Philpott.

              A Offline
              A Offline
              AspDotNetDev
              wrote on last edited by
              #21

              According to some physics theories, information cannot be transferred faster than the speed of light, and that includes torquing and gravity. Turning a clock hand by torquing it from the center will lead to a wave that travels no faster than the speed of light from the center of the clock outward to the end of the hand. Since the hand will have to be infinitely long at noon (or right before it), that wave will never reach the end of the hand, and so infinity will never be reached. It would probably also take infinite energy to move an object of infinite size. But in pure math world, I wouldn't really say it reaches it anyway. Any slight angle will be amplified massively as the hand approaches noon. Only once it reaches noon could it be said that it reached infinity. But then the lines are parallel and they do not intersect at infinity. Every length shorter than infinity is intersected, but never infinity. Just gets skipped over. Now, what happens when an unstoppable force meets an immovable object? :-\

              [Forum Guidelines]

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              • A AspDotNetDev

                According to some physics theories, information cannot be transferred faster than the speed of light, and that includes torquing and gravity. Turning a clock hand by torquing it from the center will lead to a wave that travels no faster than the speed of light from the center of the clock outward to the end of the hand. Since the hand will have to be infinitely long at noon (or right before it), that wave will never reach the end of the hand, and so infinity will never be reached. It would probably also take infinite energy to move an object of infinite size. But in pure math world, I wouldn't really say it reaches it anyway. Any slight angle will be amplified massively as the hand approaches noon. Only once it reaches noon could it be said that it reached infinity. But then the lines are parallel and they do not intersect at infinity. Every length shorter than infinity is intersected, but never infinity. Just gets skipped over. Now, what happens when an unstoppable force meets an immovable object? :-\

                [Forum Guidelines]

                R Offline
                R Offline
                Rob Philpott
                wrote on last edited by
                #22

                Hmm. What speed does gravity to work at? Say for instance the sun just disappeared suddenly (which would be bad). Does the earth still rotate around where it was for the 8 minutes it takes light to get here?

                Regards, Rob Philpott.

                A 1 Reply Last reply
                0
                • A AspDotNetDev

                  According to some physics theories, information cannot be transferred faster than the speed of light, and that includes torquing and gravity. Turning a clock hand by torquing it from the center will lead to a wave that travels no faster than the speed of light from the center of the clock outward to the end of the hand. Since the hand will have to be infinitely long at noon (or right before it), that wave will never reach the end of the hand, and so infinity will never be reached. It would probably also take infinite energy to move an object of infinite size. But in pure math world, I wouldn't really say it reaches it anyway. Any slight angle will be amplified massively as the hand approaches noon. Only once it reaches noon could it be said that it reached infinity. But then the lines are parallel and they do not intersect at infinity. Every length shorter than infinity is intersected, but never infinity. Just gets skipped over. Now, what happens when an unstoppable force meets an immovable object? :-\

                  [Forum Guidelines]

                  A Offline
                  A Offline
                  Abhinav S
                  wrote on last edited by
                  #23

                  aspdotnetdev wrote:

                  what happens when an unstoppable force meets an immovable object

                  In non-scientific terms, such a situation is a paradox. In scientific terms, such a situation cannot exist. :rolleyes:

                  There are only 10 types of people in this world — those who understand binary, and those who don't.

                  A 1 Reply Last reply
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                  • J Jorgen Sigvardsson

                    That's not a problem with infinity, that's a problem with geometry. If you setup two straight line equations for the lines, and solve them for where they intersect, you will see that there is no solution for when the lines are parallel. That's not cheating infinity - it is you who are assuming that the lines will always cross, but the assumption is wrong.

                    -- Kein Mitleid Für Die Mehrheit

                    R Offline
                    R Offline
                    Rob Philpott
                    wrote on last edited by
                    #24

                    Agreed, parallel lines do not intersect. Although I believe you could argue they still intesect at infinity. My problem is the instant when two intersecting lines suddenly become parallel due to rotation.

                    Regards, Rob Philpott.

                    C 1 Reply Last reply
                    0
                    • R Rob Philpott

                      Woken up plagued by the concept of infinity again. Precursor to a difficult day ahead methinks. Infinity in my mind is that place you never get to. Try counting to infinity and you won't get there. Purists might argue that you would if you spent an infinite amount of time counting. But, seemingly we do get there. The abstraction I have in my head is this: A clock face with a straight line through it, going straight through the 6 and 12 and extending where else, but to infinity. Draw another parallel line to the left of the clock. Then, when the hour hand is on the 9 it points to the nearest point on the second line. As time progresses, the point on the second line moves up, heading straight for infinity. Now by rights, it should never get there, but it does, 3 hours later. It got there I believe at 3 hours - (1/infinity). It's a theoretical place, but it's also real because we just went through it to get to midday. So, where is it? I've expressed my concerns to my wife but she just gives me that slightly desperate lonely look. Oh dear, deep questions about the Universe always leave me feeling edgy.

                      Regards, Rob Philpott.

                      OriginalGriffO Offline
                      OriginalGriffO Offline
                      OriginalGriff
                      wrote on last edited by
                      #25

                      Which infinity? There are many.[^]

                      All those who believe in psycho kinesis, raise my hand.

                      "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
                      "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

                      R L 2 Replies Last reply
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                      • R Rob Philpott

                        Hmm. What speed does gravity to work at? Say for instance the sun just disappeared suddenly (which would be bad). Does the earth still rotate around where it was for the 8 minutes it takes light to get here?

                        Regards, Rob Philpott.

                        A Offline
                        A Offline
                        AspDotNetDev
                        wrote on last edited by
                        #26

                        Rob Philpott wrote:

                        What speed does gravity to work at?

                        Speed of light.

                        Rob Philpott wrote:

                        Does the earth still rotate around where it was for the 8 minutes it takes light to get here?

                        Yep.

                        [Forum Guidelines]

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                        • OriginalGriffO OriginalGriff

                          Which infinity? There are many.[^]

                          All those who believe in psycho kinesis, raise my hand.

                          R Offline
                          R Offline
                          Rob Philpott
                          wrote on last edited by
                          #27

                          That's just too deep for a Sunday!

                          Regards, Rob Philpott.

                          OriginalGriffO 1 Reply Last reply
                          0
                          • R Rob Philpott

                            That's just too deep for a Sunday!

                            Regards, Rob Philpott.

                            OriginalGriffO Offline
                            OriginalGriffO Offline
                            OriginalGriff
                            wrote on last edited by
                            #28

                            And the rest of this discussion isn't !?! :laugh:

                            All those who believe in psycho kinesis, raise my hand.

                            "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
                            "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

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                            • R Rajesh R Subramanian

                              I've counted till infinity. Cheers, Chuck.

                              OriginalGriffO Offline
                              OriginalGriffO Offline
                              OriginalGriff
                              wrote on last edited by
                              #29

                              Chuck Norrἰs wrote:

                              I've counted till infinity - twice.

                              FTFY!

                              All those who believe in psycho kinesis, raise my hand.

                              "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
                              "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

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                              • A Abhinav S

                                aspdotnetdev wrote:

                                what happens when an unstoppable force meets an immovable object

                                In non-scientific terms, such a situation is a paradox. In scientific terms, such a situation cannot exist. :rolleyes:

                                There are only 10 types of people in this world — those who understand binary, and those who don't.

                                A Offline
                                A Offline
                                AspDotNetDev
                                wrote on last edited by
                                #30

                                Correct. :)

                                [Forum Guidelines]

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                                • R Rob Philpott

                                  Woken up plagued by the concept of infinity again. Precursor to a difficult day ahead methinks. Infinity in my mind is that place you never get to. Try counting to infinity and you won't get there. Purists might argue that you would if you spent an infinite amount of time counting. But, seemingly we do get there. The abstraction I have in my head is this: A clock face with a straight line through it, going straight through the 6 and 12 and extending where else, but to infinity. Draw another parallel line to the left of the clock. Then, when the hour hand is on the 9 it points to the nearest point on the second line. As time progresses, the point on the second line moves up, heading straight for infinity. Now by rights, it should never get there, but it does, 3 hours later. It got there I believe at 3 hours - (1/infinity). It's a theoretical place, but it's also real because we just went through it to get to midday. So, where is it? I've expressed my concerns to my wife but she just gives me that slightly desperate lonely look. Oh dear, deep questions about the Universe always leave me feeling edgy.

                                  Regards, Rob Philpott.

                                  L Offline
                                  L Offline
                                  Lost User
                                  wrote on last edited by
                                  #31

                                  Well you cheated, you didn't "reach" infinity at all, you tried to take the limit of a function that has none (tan(x) where x is the angle between the hand and the 9)

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                                  • J Jorgen Sigvardsson

                                    peterchen wrote:

                                    *can* reach infinity

                                    That is a contradiction in terms. Infinity is by definition unreachable...

                                    -- Kein Mitleid Für Die Mehrheit

                                    P Offline
                                    P Offline
                                    peterchen
                                    wrote on last edited by
                                    #32

                                    :sigh: yeah, you can't, but think of the fun we could have had with Rob ;)

                                    Personally, I love the idea that Raymond spends his nights posting bad regexs to mailing lists under the pseudonym of Jane Smith. He'd be like a super hero, only more nerdy and less useful. [Trevel]
                                    | FoldWithUs! | sighist | µLaunch - program launcher for server core and hyper-v server

                                    J 1 Reply Last reply
                                    0
                                    • R Rob Philpott

                                      Woken up plagued by the concept of infinity again. Precursor to a difficult day ahead methinks. Infinity in my mind is that place you never get to. Try counting to infinity and you won't get there. Purists might argue that you would if you spent an infinite amount of time counting. But, seemingly we do get there. The abstraction I have in my head is this: A clock face with a straight line through it, going straight through the 6 and 12 and extending where else, but to infinity. Draw another parallel line to the left of the clock. Then, when the hour hand is on the 9 it points to the nearest point on the second line. As time progresses, the point on the second line moves up, heading straight for infinity. Now by rights, it should never get there, but it does, 3 hours later. It got there I believe at 3 hours - (1/infinity). It's a theoretical place, but it's also real because we just went through it to get to midday. So, where is it? I've expressed my concerns to my wife but she just gives me that slightly desperate lonely look. Oh dear, deep questions about the Universe always leave me feeling edgy.

                                      Regards, Rob Philpott.

                                      C Offline
                                      C Offline
                                      Chris Austin
                                      wrote on last edited by
                                      #33

                                      Seems to me you delved into the concept of an asymptote.

                                      And above all things, never think that you're not good enough yourself. A man should never think that. My belief is that in life people will take you at your own reckoning. --Isaac Asimov Avoid the crowd. Do your own thinking independently. Be the chess player, not the chess piece. --Ralph Charell

                                      J 1 Reply Last reply
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                                      • R Rob Philpott

                                        Woken up plagued by the concept of infinity again. Precursor to a difficult day ahead methinks. Infinity in my mind is that place you never get to. Try counting to infinity and you won't get there. Purists might argue that you would if you spent an infinite amount of time counting. But, seemingly we do get there. The abstraction I have in my head is this: A clock face with a straight line through it, going straight through the 6 and 12 and extending where else, but to infinity. Draw another parallel line to the left of the clock. Then, when the hour hand is on the 9 it points to the nearest point on the second line. As time progresses, the point on the second line moves up, heading straight for infinity. Now by rights, it should never get there, but it does, 3 hours later. It got there I believe at 3 hours - (1/infinity). It's a theoretical place, but it's also real because we just went through it to get to midday. So, where is it? I've expressed my concerns to my wife but she just gives me that slightly desperate lonely look. Oh dear, deep questions about the Universe always leave me feeling edgy.

                                        Regards, Rob Philpott.

                                        S Offline
                                        S Offline
                                        streamcap
                                        wrote on last edited by
                                        #34

                                        As others have stated, you sadly stumbled on (over?) a singularity point. Shame though, many of us would attest to having empirical evidence supporting your theory: 3 hours = (1/infinity) => infinity = 1/3 hours = 20 minutes - mind you in the (in)appropriate context.

                                        modified on Sunday, January 3, 2010 9:59 AM

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                                        • L Lost User

                                          Infinity is not a number therefore by trying to represent it with numbers you are doomed.

                                          Join the cool kids - Come fold with us[^]

                                          L Offline
                                          L Offline
                                          Luc Pattyn
                                          wrote on last edited by
                                          #35

                                          :~

                                          Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]


                                          Merry Christmas and a Happy New Year to all.


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