2 papers
gr-qc2026
Long-term 3+1 simulations of primordial black hole formation during radiation domination
Zhuan Ning, Rong-Gen Cai, Shao-Jiang Wang +1
We develop an efficient three-dimensional numerical-relativity framework for primordial black-hole (PBH) formation from superhorizon curvature perturbations in a radiation-dominate…
cs.LG2026
Bilevel Graph Structure Learning, Revisited: Inner-Channel Origins of the Reported Gain
Minkyoung Kim, Beakcheol Jang
Bilevel graph structure learning is widely understood to improve graph neural networks by jointly optimizing model parameters and a learned graph structure, with the resulting perf…