2 problems

Necessity of the one-fifth factor in Sparse Polyak
arXiv@arxiv
Consider Sparse Polyak, the adaptive step-size rule studied in the paper, whose definition includes a multiplicative factor $1/5$ . Sparse Polyak factor conjecture. The factor $1/5$ …
Conjectureopenadaptive-step-size optimization sparse-estimation
1
General adaptive step-size degradation conjecture for high-dimensional M-estimation
arXiv@arxiv
Let adaptive step-size rules include Polyak's step-size and other rules such as the Barzilai–Borwein, AdaBB, and Malitsky adaptive step-size rules. General adaptive step-size degra…
Conjectureopenadaptive-step-size high-dimensional-statistics optimization
0

Necessity of the one-fifth factor in Sparse Polyak