Recent content by LMZ

Homework Statement 2 coordinate systems are given: 1st: \vec{a}, \vec{b}, \vec{c} 2nd: \vec{m}, \vec{n}, \vec{p} in system \vec{a}, \vec{b}, \vec{c} basis vectors of 2nd system have values: \vec{m}=\{2/3, 1/3, 1/3\}, \vec{n}=\{-1/3, 1/3, 1/3\}, \vec{p}=\{-1/3, -2/3, 1/3\} also known that...

offtop: totally agree with you about memorizing all this coeffs and formulas. normalization condition is: \int_{-\infty}^{\infty}\Psi \Psi^{*} = 1 where \Psi^{*} is http://en.wikipedia.org/wiki/Complex_conjugation" of \Psi so, introduce your \Psi in integral, and get A from there.

yeap! i think i know what is heat equation: http://en.wikipedia.org/wiki/Heat_equation#Solving_the_heat_equation_using_Fourier_series for example if i put these: init = f[x, 0] == 1 bc = {f[0, t] == 0, f[1, t] == 0} in mathematica i got this warning: A warning is generated in this...

Hello to all! Homework Statement for testing my program i need a heat equation with numerical initial and boundary conditions: Derivative[2, 0][f][x, t] == Derivative[0, 1][f][x, t] f[x, 0] == numerical f[0, t] == numerical, f[numerical, t] == numerical PS. to moders: please, if...

thanks a lot!

please be more concrete

Two rings with radius R and r are let down in the soap water. Between them pellicle appeared (like in image). Image: here all are symmetric ;) problem: need to find y=f(x) what i think:volume of figure is minim. maybe express volume via needed function, then get minimum of volume, and find...