Multinomial theorem (Expansion coefficients are multinomial n!/(n1!nk!) with Σ ni = n.)
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Expansion coefficients are multinomial n!/(n1!…nk!) with Σ ni = n.
What each symbol means
| Symbol | What it stands for |
|---|---|
| k | Number of summands |
| n | Total degree |
When to use this
Finite expansion; commuting symbols.