Circle: $C[z_0,R] = |z-z_0| = R$
Disc: $D[z_0,R] = |z-z_0| < R$
Closed Disc: $\overline{D}[z_0,R] = |z-z_0| \le R$
Punctured disc: $0 < |z-z_0| < R$
How do I do the dot inside the $D$
to denote a punctured disc?
circleslettersmath-modesymbols
Circle: $C[z_0,R] = |z-z_0| = R$
Disc: $D[z_0,R] = |z-z_0| < R$
Closed Disc: $\overline{D}[z_0,R] = |z-z_0| \le R$
Punctured disc: $0 < |z-z_0| < R$
How do I do the dot inside the $D$
to denote a punctured disc?
Best Answer
It's among the worst notation I have ever seen.
If you really want it, at least do it right, with the dot in the middle of the D.
The only “manual” adjustment is
\mkern1mu
to shift the dot a bit to the right. The amount of shifting depends on the font and the shape of the D, so it cannot be made automatic.A more complete version with syntax support also for the closed disk.
The advantage of having a unified syntax is that if, for instance, you decide for
\dot{D}
instead of\puncturedD
, you can just change the call in the definition of\disk
.