The cover logo aleph is a slightly different shape from our standard logo, since David used another source to get a clean (non-jagged) font. Here is the largest standard logo we have, which is 320x320: http://us.metamath.org/mmbig.gif
Does anyone with graphics talent have the ability to smooth out the 320x320 one so it looks non-jagged in a 1920x1080 cover image?