y comm x-monoid ... ??? or Z-graded comm x-monoid, for example ... ??? ...
?? for example x =
?? x-fan ... ???? ....
??? 3-place chain complex here ??? ....
?? comm monoid or Z-graded comm monoid in accidental topos... wrt TAG structure ... ???? ...... ???? ....
?? some of this stuff in paper ??? ....
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