You can also use \mathds{1} from \usepackage{dsfont}, which looks similar but is not pixelated.
– Apr 16 '20 at 01:19
@Alan Phelype Olein barbara Zarko this is about getting bold letters withing the beamer framework that is many things cannot be changed easily.
– Hao SApr 18 '20 at 01:32
For a bold (as opposed to double-stroke) zero 0 you can use $\boldsymbol{0}$ from \usepackage{amsmath} or $\bm{0}$ from \usepackage{bm}.
– Apr 18 '20 at 02:04
@Schrödinger'scat sorry I meant double stroke 0 \mathds{0} is just nothing
– Hao SApr 18 '20 at 14:50
idk wtf designed these fonts
– Hao S Apr 18 '20 at 01:340you can use$\boldsymbol{0}$from\usepackage{amsmath}or$\bm{0}$from\usepackage{bm}. – Apr 18 '20 at 02:04