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RingEnvs

names of all defined rings
Syntax 

RingEnvs():TAGGED

Description
This function returns the tagged list of identifiers for the existing rings.

Example 
  R_1 ::= QQ[a,b,c];
  R_2 ::= QQ[x,y];
  RingEnvs();   -- your result may be different
["QQ", "QQt", "R", "R_1", "R_2", "ZZ"]
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See Also