Only mechanics I have is Arnold

oh jeez if you can understand the Arnold proof I applaud you

I learned this from Arnold

I don’t think Arnold is an analyst

You’re thinking about Arnold

Arnold is the most famous

is Arnold insane too?

@JohnRennie is Arnold

Right. Check Arnold's book for details.

Besides Arnold I have two Russian books. One on Differential topology/surgery with a view towards Ricci flow and one on semigroups and heat kernels

Arnold has a proof of an incorrect version of Huygens principle without ever talking about the wave equation

@BalarkaSen have you read Arnold's mechanics book?

Arnold style math

@Majid According to Arnold (Mathematical Methods of Classical Mechanics), that part is true for all $n$

So I learned Huygen's principle from Arnold, who makes no mention of the dimension mattering

(such as arnold)

@Blue maybe you should read Arnold

I don't know about Lagrangians in general. In Arnold there are no jet bundles. Some people have jet bundles. For what reason, I cannot say.

@ShaVuklia You need to read Arnold.

@ShaVuklia Did you even look at Arnold?

@ShaVuklia Arnold.

@Sanya did you check out Arnold?

Do you own Arnold?

Ok, I read Arnold, we can talk about something else

Maybe you can do that with phi, I'd have to check Arnold

@DanielSank According to Arnold, it's the Newton-Leibniz-Gauss-Green-Ostrogradskii-Stokes-Poincare theorem.

did you check Arnold?

it's in Arnold I bet

get the book by Arnold for details

@DanielSank Arnold.

you did not read Arnold, I gurantee

Arnold

Note Arnold too

But some (Arnold I think) write lagrangian and hamiltonian.

@Secret Just look at pages 55-57 of Arnold

let's grab Arnold from the physics shelf of shame

I've also had a nightmare about V.I. Arnold

@JunaidAftab Arnold talks about manifolds for 80% of the book

@EmilioPisanty Do you still have Arnold?

I'm having a hard time connecting the thing Arnold actually proves to what he claims it shows.

@ChrisWhite You read Arnold, right?

According to Arnold, they are.

Or according to Arnold?

Yes, but Arnold shows (or leaves it as an exercise) that the particular coordinate system does not matter

@NeuroFuzzy I recall not understanding Arnold's definition.

Arnold is the go-to for people in my field

Is Qmechanic Arnold?

@ChrisWhite how many physics students actually read Arnold?

Arnold for the action principle

Let's see what Arnold says...he might require that forces are Lipschitz.