On angles between linear subspaces in \(\mathbb{R}^4\) and the singularity. (English. Russian original) Zbl 07878662
Math. Notes 115, No. 3, 414-419 (2024); translation from Mat. Zametki 115, No. 3, 450-457 (2024).
Reviewer: Jaroslav Hančl (Ostrava)