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Apr
5
accepted Trick with differentials from $\frac{dr}{ds} \to \frac{dr}{dt}$
Apr
5
asked Trick with differentials from $\frac{dr}{ds} \to \frac{dr}{dt}$
Feb
23
awarded  Popular Question
Feb
3
revised Partial derivatives tricks in derivation of Lagrange equation of motion
edited body
Jan
31
accepted Partial derivatives tricks in derivation of Lagrange equation of motion
Jan
31
answered Partial derivatives tricks in derivation of Lagrange equation of motion
Jan
22
accepted Detect if two ellipses intersect
Jan
22
comment Detect if two ellipses intersect
Thanks, i made it work for ellipses with parallel axes.
Jan
22
comment Detect if two ellipses intersect
@YvesDaoust outlines would be enough for me
Jan
22
revised Detect if two ellipses intersect
added 30 characters in body
Jan
22
comment Detect if two ellipses intersect
I will try to write a program with Lagrange multipliers and write back:)
Jan
22
comment Detect if two ellipses intersect
Could you please extend your answer a bit?
Jan
22
comment Detect if two ellipses intersect
You mean to take some kind of integral of $f$ over $E_2?$
Jan
22
revised Detect if two ellipses intersect
added 12 characters in body
Jan
22
asked Detect if two ellipses intersect
Jan
18
comment Partial derivatives tricks in derivation of Lagrange equation of motion
Could you please give some textual explanation for your answer? Thanks.
Jan
14
asked Partial derivatives tricks in derivation of Lagrange equation of motion
Jan
5
comment derivative with respect to a vector/matrix
Thank you for the intresting way of showing it.
Jan
5
accepted derivative of $\frac{d}{dn}(1+\epsilon/2n)^n.$
Jan
5
asked derivative of $\frac{d}{dn}(1+\epsilon/2n)^n.$