Matrix-exponentiation operator: Difference between revisions
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pow=: 4 : 'mp&x^:y =i.#x'</lang> |
pow=: 4 : 'mp&x^:y =i.#x'</lang> |
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or, from [[j:Essays/Linear Recurrences|the |
or, from [[j:Essays/Linear Recurrences|the K wiki]], and faster for large exponents: |
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<lang j>pow=: 4 : 'mp/ mp~^:(I.|.#:y) x'</lang> |
<lang j>pow=: 4 : 'mp/ mp~^:(I.|.#:y) x'</lang> |
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