Matrix-exponentiation operator: Difference between revisions

(→‎{{header|J}}: minor (grammar))
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pow=: 4 : 'mp&x^:y =i.#x'</lang>
 
or, from [[j:Essays/Linear Recurrences|the KJ wiki]], and faster for large exponents:
 
<lang j>pow=: 4 : 'mp/ mp~^:(I.|.#:y) x'</lang>
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