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# Math cure for piles

Mathematical solution for haemmorhoids
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Alan Turing developed a mathematical model for the patterns you get on stripey and spotty animals. Suppose each bit of the skin is either light or dark. Bits will tend to be light or dark if all their neighbours are light or dark: bits on the edge, with half light and half dark neighbours can change to preserve the average lightness or darkness in the region. You can simulate this with discrete cellular automata, but there are also continuous differential equations with the same properties.

There are some simple predictions. The regions of light and dark will tend to have smooth edges. If the light-to-dark ratio is close to 0.5 then you will get lines: if it isn't, then you will tend to get spots. However, where the animal is strongly curved, like the tail of a leopard, you will get stripes that run around the tail. Spots are pretty stable, but stripes tend to straighten up until the run around the animal, and incomplete stripes tend to grow out. This last prediction was verified on angelfish only in the last few years.

Okay, now let's try the same thing on the inside of the animal. Suppose in the colon your regions are not light and dark, but convex and concave. This would normally give you a set of ridges running around the colon, but isolated blobs between the ridges could be stable. However, unlike the coloured regions we had before, these regions of concavity and convexity are changing the local geometry too. If one of these blobs was wide enough, then it could grow ridges of its own on the surface; to maintain the balance of concave and convex, the neck of the blob would grow, and you have a polyp, poor you.

If you cut off the head of polyp, you may still have the local imbalance of concavity and convexity in the bit at the base. Once the thing has healed, the most likely thing it will do is grow right back again. The right solution would seem to be to pinch up a ridge between the polyp and the nearest ridge. Instead of a line and a dot, you will have a line with a little dead-end line growing off it. When the two regions have joined, take off the clip doing the pinching. The dead-end line should shrink back into the original ridge, and never want to grow back.

Well, so goes the theory anyhow...

 — Richard K, Dec 18 2002

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 That must be the first proposed surgical technique that I've seen on the halfbakery. The only downside I can see is that you'd have a clip up your arse until the surgery heals, but I'm sure the impact of that can be minimised with good design.

Of course, the idea hinges on your having correctly determined the cause of hemorrhoids, of which I, for one, have absolutely no idea. Tentative croissant.
 — st3f, Dec 18 2002

My money was on Linear Regression .....
 — 8th of 7, Dec 18 2002

Man, I dunno, I though math gave people piles, not cured it.
 — Nick@Nite, Dec 18 2002

What's the word for a surgeon whose specialty is mathematics?
 — phundug, Apr 17 2003

A Mathemologist.
 — Macwarrior, Jul 12 2003

there's already a mathematical cure for CONSTIPATION if that's any help. (you work it out with a pencil)
 — tom braider, Jul 13 2003

Astrophysician.
 — thumbwax, Jul 13 2003

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