T. Traetta

activity

20182026

most citedA sharp upper bound for the harmonious total chromatic number of graphs and multigraphs

1 citations · 2 across the 11 of their papers we have counts for

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math.CO2026

A note on near alternating sign matrices with prescribed row and column weights

Tommaso Traetta

We study near alternating sign matrices with prescribed row and column weights. After recalling the basic definitions and the necessary conditions coming from the Gale--Ryser theor…

math.CO2026

Characterizing pyramidal Hadamard designs with the largest number of fixed points

Tommaso Traetta

A symmetric $(v, k, λ)$ -design is said to be $f$ -pyramidal, with $f < v - 1$ , under the action of a group $G$ if $G$ acts as an automorphism group fixing $f$ points and acting sharply tr…