# Deep math of the folded pizza slice

2 Likes

Or, you could eat your pizza with a knife and fork, like a civilized person.

7 Likes

Iām so totally going to use that example.

Thatās fighting words.

6 Likes

A few years back two of my colleagues won an award for a paper calculating the shape of the largest taco you could make from a given round tortilla:
http://www.maa.org/programs/maa-awards/writing-awards/the-worlds-biggest-taco

1 Like

Nothing inspires violent confrontation like math and pizza.

Case in point: Teenage Mutant Ninja Turtles

4 Likes
3 Likes

Foods like pizza go WAY back. The Romans had something like it, served at stands on the street. The way that folks wandering the streets 2000 years ago ate oiled, spicy flat bread was almost certainly closer to the way busy New Yorkers fold and nibble than this fancy fork and knife thing.

3 Likes

Mmmmmmā¦ Placenta. (No, that that sort. The pastry variety.)

2 Likes

This seems to have been chased a bit too far down the rabbit hole. For Gaussian curvature to apply fully, Iām pretty sure the pizza slice would have to be totally inelastic - incapable of being at all stretched. This isnāt the case, so the pizza does flex ever so slightly.

A more useful way to put this would be that folding the pizza increases itās area moment of inertia, thereby increasing itās longitudinal stiffness and decreasing all local stresses to below yield values. Thatās probably somehow related to Gaussian curvature, but I havenāt thought through just how yet.

1 Like

2 Likes

mathematical principal

sigh I think the word is āprincipleā. And you call yourself a writer Just a heads up.

and lo, as the great age approached the leadership of the houses of learning were turned over to the equations.

only here you can find such a stupid article! proud to be an italian pizza eater (without math but with mouth)

@mtdna donāt attack the person, attack the argument. @7lions is not wrong (at least in the first paragraph; Iām not qualified enough to comment on the second). The article does implicitly assume that the pizza doesnāt stretch, which seems dubious, given that it is of soft doughy construction.

More generally, Gaussian curvature is about idealized surfaces, and it isnāt obvious that its results should apply without qualifications to real life objects ā which, unlike idealized surfaces have a thickness, internal structure and, as we know, a fucking mind of their own.

I take it you didnāt read past the first line of 7lionsā post?

Not sure what you meanāthe article was quite enlightening, at least once they get past pizza into actual physics. Your hostility may say more about you than about the article.

2 Likes

Thatās very cool. An actual ancient recipe, detailed enough to follow.

Huh, that is actually pizza-ish. Interesting. Iāve occasionally seen claims that the Romans invented hamburgers, also sold at street stands, but the recipe provided as documentation turns out out to be a sort of large meatball made with wine, bread crumbs, and spices. It sounds tasty, but Iām not sure where anyone gets āhamburgerā out of it.

1 Like

The article doesnāt implicitly assume it. It assumes explicitly - literally in bold face - that you donāt āā¦stretch, shrink, or tear [the Gaussian curvature]ā. Maybe you should join 7lions in the RTFA club.