Vítězslav Kala

activity

20092026

most citedNumber fields without n-ary universal quadratic forms

36 citations · 235 across the 39 of their papers we have counts for

collaborators

Showing 2019Show all

2 papers · 1 filter

math.AC2019★ 7 cited

Idempotence of finitely generated commutative semifields

Vítězslav Kala, Miroslav Korbelář

We prove that a commutative parasemifield S is additively idempotent provided that it is finitely generated as a semiring. Consequently, every proper commutative semifield T that i…

math.NT2019★ 1 cited

Ternary quadratic forms representing a given arithmetic progression

Tomáš Hejda, Vítězslav Kala

A positive quadratic form is $(k, ℓ)$ -universal if it represents all the numbers $k x + ℓ$ where $x$ is a non-negative integer, and almost $(k, ℓ)$ -universal if it represents a…