Brief communications

Projective invariants of planar $2$-webs

I. S. Strel'tsova

Astrakhan State University, 20a Tatischev str., Astrakhan, 414056 Russia

Abstract: In this paper we compute the projective differential rational invariants of linear planar $2$-webs. The invariants are used to find conditions under which two linear planar $2$-webs are equivalent with respect to the group of projective transformations.

Keywords: projective differential invariants, invariant derivations.

UDC: 514.755:517.957

Received: 04.12.2017

 English version: Russian Mathematics (Izvestiya VUZ. Matematika), 2018, 62:6, 80–84

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