bob012345's latest activity
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bob012345 reacted to martinbn's post in the thread I Physicists disagree wildly on what quantum mechanics says about real… with
Like.
It is not any better in other languages either. -
bob012345 reacted to Charles Link's post in the thread I Geometry problem of interest with a 3-4-5 triangle with Like.
Yes, last night I verified this in general, using a triangle with one slope of zero, with vertices at ## (0,0) ## and ## (a,0) ##...
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bob012345 replied to the thread I Physicists disagree wildly on what quantum mechanics says about real….All I can say in my defense is that when I took it, the math caused a lot of confusion! :woot:
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bob012345 replied to the thread I Physicists disagree wildly on what quantum mechanics says about real….Any theory which causes more confusion than clarity after a century of use should probably be junked.
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bob012345 reacted to Charles Link's post in the thread I Geometry problem of interest with a 3-4-5 triangle with Like.
It was a week or two ago that a friend of mine showed me a video of interest. The video is somewhat incomplete mathematically, but...
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bob012345 reacted to SammyS's post in the thread I Geometry problem of interest with a 3-4-5 triangle with Like.
Not only is this true for all right triangles, it's true for all triangles in general.
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bob012345 replied to the thread I Geometry problem of interest with a 3-4-5 triangle.There appears to be a simple formula for the radius of the inscribed circle of any right triangle that goes as the area of the triangle...
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bob012345 replied to the thread B Six Pencil Puzzle.Bending, twisting, forcing and distorting the pencils is not allowed. In the original puzzle with cigarettes it was a rule that they...
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bob012345 replied to the thread B Six Pencil Puzzle.I think there is no loss of generality by using square pegs which lay flat in the plane. Then the gap would be quite easy to see.
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And... Version 2. Now I'm 99.9% sure it doesn't work. Although it's hard to show in a photo. The cable ties are a nice easy solution...
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I tested "solution" #6 with real pens and can confirm that they don't all touch each other. There's a small, visible gap. And I can...
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bob012345 replied to the thread B Six Pencil Puzzle.Here is Martin Gardner’s solution for 7 which also is a solution for 6 along side his original solution for 6. [/SPOILER]
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Here are 2 solutions with 7 infinite cylinders. https://www.sciencedirect.com/science/article/pii/S0925772114000819 Major computation...
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bob012345 replied to the thread B Six Pencil Puzzle.I can tell you that the solution in the Martin Gardner book matches the solution in post #3 above but hints there are others.
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It would be nice to have a more rigorous solution. Maybe some linear algebra since there are so many constraints?
