Paul Tricot

collaborators

3 papers

math.AG2026

Biangular lines with angles arccos(1/5) and arccos(3/5)

Paul Tricot

The largest known biangular lines systems in dimension 7 through 20 are due to Ganzhinov and SzÃ¶llÅsi, and the lines make angles $arccos (\frac{1}{5})$ and $arccos (\frac{3}{5})$ …

math.CO2024

On $3$ -designs from $P G L (2, q)$

Paul Tricot

The group $P G L (2, q)$ acts $3$ -transitively on the projective line $GF (q) \cup {\infty}$ . Thus, an orbit of its action on the $k$ -subsets of the projective line is the block set o…

math.CO2024

Symmetric Perfect $2$ -colorings on $J (10, 3)$

Paul Tricot

We study perfect $2$ -coloring of the Johnson graphs $J (n, 3)$ associated with the third largest eigenvalue and symmetric quotient matrix, which exists only when $n \in {6, 10}$ . W…

Biangular lines with angles arccos(1/5) and arccos(3/5)

On 3-designs from PGL(2,q)

Symmetric Perfect 2-colorings on J(10,3)

On $3$ -designs from $P G L (2, q)$

Symmetric Perfect $2$ -colorings on $J (10, 3)$