User:Julius

List of contributions
Bernstein's Theorem on Unique Extremal

Condition for Differentiable Functional to have Extremum

Conditions for C^1 Smooth Solution of Euler's Equation to have Second Derivative

If Definite Integral of a(x)h(x) vanishes for any C^0 h(x) then C^0 a(x) vanishes

If Double Integral of a(x, y)h(x, y) vanishes for any C^2 h(x, y) then C^0 a(x, y) vanishes

Necessary Condition for Integral Functional to have Extremum for given function

Necessary Condition for Integral Functional to have Extremum for given function/Lemma

Simple Variable End Point Problem

Simplest Variational Problem

Differential of Differentiable Functional is Unique

Differential of Differentiable Functional is Unique/Lemma