The American Mathematical Society submitted an update to the
amscls
package.
Version number: 2015-03-10 License type: lppl1.3
Summary description: AMS document classes for LaTeX.
Announcement text: ---------------------------------------------------------------------- patch to amsthm.sty to accommodate incorporation of fixltx2e in the LaTeX core ----------------------------------------------------------------------
This package is located at http://mirror.ctan.org/macros/latex/required/amslatex/amscls
More information is at http://www.ctan.org/pkg/amscls
We are supported by the TeX Users Group http://www.tug.org . Please join a users group; see http://www.tug.org/usergroups.html .
------------------------------------------------------------------------
Thanks for the upload.
For the CTAN Team Manfred Lotz