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单词 radius of convergence
释义 radius of convergence
[`rād·ē·ǝs ǝv kǝn`vǝr·jǝns]
MATHEMATICS
The positive real number corresponding to a power series expansion about some number a with the property that if x - a has absolute value less than this number the power series converges at x, and if x - a has absolute value greater than this number the power series diverges at x.
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