List questions from formal-power-series

Published on 04 Dec 2015 - 21:28

142

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Elements of $\mathbb{C}(x)$ and algebraic elements over $\mathbb{C}(x)$

Published on 09 Dec 2015 - 6:39

62

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Convergence of some sums of complex functions

Published on 18 Dec 2015 - 15:06

51

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Do the strongly vanishing elements of $R[[x]]$ form an ideal?

Published on 29 Dec 2015 - 3:44

437

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If $R[x]$ and $R[[x]]$ are isomorphic, then are they isomorphic to $R$ as well?

Published on 05 Jan 2016 - 18:18

79

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Extension of idempotent ideals

Published on 11 Jan 2016 - 7:20

302

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Coefficient of a term in a formal power series

Published on 21 Jan 2016 - 21:00

794

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Simplifying Power Series as a Summation - Alternating Coefficients

Published on 27 Jan 2016 - 19:21

1.8k

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Square Root of Formal Power Series

Published on 19 Feb 2016 - 14:44

487

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How do you find the incidental equation when using the Frobenius method?

Published on 23 Feb 2026 - 10:23

526

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Perfect square in field of formal Laurent series

Published on 28 Feb 2016 - 4:18

157

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Coefficient space of formal power series corresponding to characteristic classes

Published on 27 Mar 2026 - 3:42

332

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Invertible matrices over ring of formal Laurent series

Published on 08 Apr 2016 - 17:08

41

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Algebraic or combinatorial proof that $(\sum_{n=0}^\infty {\frac{1}{m} \choose n} z^n )^m = 1+z$ as formal polynomials

Published on 15 Apr 2016 - 21:06

532

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Applying Cauchy product to formal power series

Published on 23 Feb 2026 - 9:30

List Question

Power series expansion of $x\ln(\sqrt{4+x^2}-x)$

Elements of $\mathbb{C}(x)$ and algebraic elements over $\mathbb{C}(x)$

Convergence of some sums of complex functions

Do the strongly vanishing elements of $R[[x]]$ form an ideal?

If $R[x]$ and $R[[x]]$ are isomorphic, then are they isomorphic to $R$ as well?

Extension of idempotent ideals

Coefficient of a term in a formal power series

Simplifying Power Series as a Summation - Alternating Coefficients

Square Root of Formal Power Series

How do you find the incidental equation when using the Frobenius method?

Perfect square in field of formal Laurent series

Coefficient space of formal power series corresponding to characteristic classes

Invertible matrices over ring of formal Laurent series

Algebraic or combinatorial proof that $(\sum_{n=0}^\infty {\frac{1}{m} \choose n} z^n )^m = 1+z$ as formal polynomials

Applying Cauchy product to formal power series

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