cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A171105 Multicomponent Gromov-Witten invariants for genus 0.

Original entry on oeis.org

1, 1, 12, 675, 109781, 40047888
Offset: 1

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Author

N. J. A. Sloane, Sep 27 2010

Keywords

Comments

In this entry and in A171104, a multicomponent Gromov-Witten invariant is the number of (possibly reducible, hence "multicomponent") curves in CP^2 of degree n and genus g passing through given 3n-1+g points, so this is the Severi degree N(n, delta) where cogenus delta = (n-1)*(n-2)/2 - g, cf. A171108 and references therein. In particular, a(5) = A171116(5). - Andrey Zabolotskiy, May 04 2022

Links

Crossrefs

Cf. A171104, A171108, A171116.
Cf. Gromov-Witten invariants, counting irreducible curves only: A171109, A171110, A171111.

Extensions

a(5)-a(6) added by Andrey Zabolotskiy, May 04 2022
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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