TY  - JOUR
AU  - Guzmán, Osvaldo
TI  - The ultrafilter number and $\mathfrak {hm}$
JO  - Canadian journal of mathematics
PY  - 2023
SP  - 494
EP  - 530
VL  - 75
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/S0008414X21000614/
DO  - 10.4153/S0008414X21000614
ID  - 10_4153_S0008414X21000614
ER  -