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Results tagged with operators
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user 39507
Questions about using or composing operators--functional mappings from one state or vector space to another.
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Sum over integer partition with variable function argument
Define
$$\hat{X}(Y) = [X,Y]
$$
I have known matrices $S_i$ and $V$. I am trying to use Mathematica to define a function which calculates
$$
\sum_{\substack{n_1, \ldots, n_k>1\\ n_1+\ldots n_k = m}} …
- 253
0
votes
Sum over integer partition with variable function argument
Here's an answer based on that of march above.
ad[X_, Y_] = X.Y - Y.X;
SS[k0_, m0_] :=
Module[{k = k0, m = m0, inds},
inds = Flatten[Permutations /@ IntegerPartitions[m, {k}], 1];
ss = Map[S, i …
- 253