Reputation
57,240
Next tag badge:
139/100 score
18/20 answers
Badges
2 90 227
Newest
 bugs
Impact
~766k people reached

Jul
1
comment Is there an elegant way of delaying evaluation of `A==B` when calling a function that uses this pattern
You should have a look at the tutorial.
Jul
1
answered Confirming conservation laws for complex valued functions
Jun
30
accepted Does Mathematica support variable frame rate for any video format, in analogue of GIF-style “DisplayDurations”?
Jun
30
comment Pull out scalars from NonCommutativeMultiply in commutator of SU2 spin algebra
Yes, if the individual spins are larger than 1/2, the part involving the Kronecker product would stay unchanged. As for replacing the Pauli matrices, one could perhaps benefit from using the Schwinger representation of arbitrary spins in terms of spin-1/2. Anyway, I admire your patience for $N=10$...
Jun
30
answered Initializing several values of a function
Jun
29
comment FullSimplify not giving me a physically useful answer for Mott scattering
I think you want this: With[{A=1/137,B=1,p=100},NIntegrate[\[Pi] A^2 (1-(B^2) (Sin[x/2])^2) (Sin[x])/(2 (p^2) (B^2) (Sin[x/2])^4),{z,0,750},{x,ArcTan[(600-z),155],ArcTan[(100-z),155]}]]/700 I.e., use NIntegrate and follow the advice of @rcollyer. Note the order of integration variables (outermost first).
Jun
29
comment Simplifying expression with non-commutating entries
@k_v If $[a,b]=0$, it follows that $[a,b^n]=[a^n,b]=0$, so this is not an issue.
Jun
29
comment How to solve time dependent coupled differential equations using Floquet method?
You're missing a Dot in the differential equation. What have you tried?
Jun
29
comment Pull out scalars from NonCommutativeMultiply in commutator of SU2 spin algebra
Yes, with those huge matrices it made a big difference to avoid the LinearSolve step. Fortunately, there is this orthogonality relation between Pauli matrices that makes that possible.
Jun
29
comment Pauli matrices — simplify expressions without printing out the raw matrix
@daveboden Thanks, it's always good to see different approaches.
Jun
29
revised Simplifying expression with non-commutating entries
Shorter version
Jun
29
answered Simplifying expression with non-commutating entries
Jun
28
reviewed Close Plotting a set of points given by a complex expression
Jun
28
reviewed Close Why doesn't Mathematica support Import for SWF files?
Jun
28
reviewed Close How to use NDSolve to solve the system of differential equations?
Jun
27
answered Remove line breaks or return codes from string
Jun
26
comment Does Mathematica have a built-in tool that allows one to operate on both sides of an equation?
Or eqn=3x+8==16; Map[1/16*#&,eqn], or Distribute[1/16 eqn,Equal]
Jun
25
answered Defining symbol shortcuts in the Front End
Jun
25
comment Defining symbol shortcuts in the Front End
I noticed that in version 10.1 the command OptionValue[Options[EvaluationNotebook[]],InputAliases] does not work in a new notebook. I'll write a new answer with my template code for this.
Jun
25
revised How to Clear variables with apostrophe?
Previous Options command fails when run in new notebook under version 10.