2 papers
math.CO2026
Extremal -index problem in outerplanar graphs
Jin Cai, Leyou Xu, Bo Zhou
Outerplanar Turán problem has received considerable attention recently. We study the spectral version via -index. We determine the unique graph that maximizes the -index amo…
math.AG2024
On regular surfaces of general type with numerically trivial automorphism group of order
Jin-Xing Cai, Wenfei Liu
Let be a regular minimal surface of general type over the field of complex numbers, and the subgroup of automorphisms acting trivially on $H^*(S,\m…