User:Karlhahn/testTemplates

• —{{User:Karlhahn/userContribs|Karlhahn|my contributions}} gives my contributions
• —{{User:Karlhahn/userContribs|Karlhahn}} gives contributions

For use in warning disruptive persons on their talk pages that they are about to be blocked.

• —{{User:Karlhahn/nonadminWarn|this page}} gives

  Your repeated efforts to vandalize articles as you did to this page makes it seem that you are unaware that Wikipedia is a serious project. You have been reported to the administration group for continuing vandalism and an administrator will review your contributions shortly.

• —{{User:Karlhahn/nonadminWarn|this page|that page}} gives

  Your repeated efforts to vandalize articles as you did to this page and that page makes it seem that you are unaware that Wikipedia is a serious project. You have been reported to the administration group for continuing vandalism and an administrator will review your contributions shortly.

My personal user box:

• —{{User:Karlhahn/KarlsUserBox}} gives

Karl Hahn (talk · contribs · logs)

• — already adopted by a number of users after just one week: 27 March 2026

• —

Userbox for mathematical physics:

• —{{User:Karlhahn/mathphys userbox}}

Userbox for Celestial mechanics and Astronautics:

• —{{User:Karlhahn/user celestial mechanics}}

Math-vanity userbox:

• —{{User:Karlhahn/User e-irrational}} gives

${\displaystyle e\neq {\frac {p}{q}}}$

This user can prove that the number, e, is irrational.

• — {{User:Karlhahn/user pi-irrational}}

${\displaystyle \pi \neq {\frac {p}{q}}}$

This user can prove that ${\displaystyle \pi }$ is irrational.