[texhax] page number of the first page of part and chapter

[numbertheory]

Dear sir:
     Thanks!

I  want  that  there are no page number on the first page of each
part , but footer of the first page of each chaper contain page number
centered.

 what's the code to get the output?

 Thanks a lot!

 \documentclass[openany]{book}
.............

 \begin{document}
\frontmatter

 \tableofcontents

 \mainmatter
\part{}
\chapter{}
....................
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