Showing math.GNShow all
2 papers · 1 filter
math.GN2026
Dense-Kernel and Closed-Core Reductions in the D-space Problem for Charming Spaces
Xing-Yu Hu, Ze-Qi Yin
Let X be a charming space with a Lindelof Sigma kernel Y, and let B be the closure of Y in X. We show that the question whether every charming space is a D-space can be reduced fir…
math.GN2026
Raikov Remainders of Quotients by Raikov-Complete Almost Metrizable Normal Subgroups
Xing-Yu Hu
Let \(N\) be a closed normal subgroup of a topological group \(G\), and let \(\widehat q:ρG\toρ(G/N)\) extend the quotient homomorphism. We prove that \(r_ρ(G/N)=\widehat q\bigl(r_…