Derivation of Lagrange-Charpit Equations
139631
How to take this exterior derivative of the expression $du - \sum_i p_i dx_i$?
14656
The differential equation $xu_{x}+yu_{y}=2u$ satisfying the initial condition $y=xg(x),u=f(x)$
23027
Deriving equations of motion using integration
14778
Derivation of uncertainty propagation?
154454
Why are $L_4$ and $L_5$ lagrangian points stable?
82286
Derivation of asymptotic solution of $\tan(x) = x$.
56446
A kind of converse of Lagrange's Theorem
983
Use partial or covariant derivatives when deriving equations of a field theory?
73131
Derivation of the gaussian integral
27296
Derivation of Lagrangian of electromagnetic field from Lorentz force
140202
Derivation of Frey equation from FLT
121574
Schrödinger equation derivation and Diffusion equation
6843
Explain $\iint \mathrm dx\,\mathrm dy = \iint r \,\mathrm \,d\alpha\,\mathrm dr$
102496
Derivation of the formula for the vertex of a parabola
3310
Application of Liouville's Theorem
52620
Solve the pde $u_t(x,t)=u_{xx}(x,t)-bu(x,t)+q(t)$ for $u(x,t)$
6937
General solution to the PDE $xU_x+yU_y=0$