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5.1.119 quote

Syntax:
quote ( expression )
Type:
none
Purpose:
prevents expressions from evaluation. Used only in connections with write to ssi links, prevents evaluation of an expression before sending it to an other SINGULAR process. Within a quoted expression, the quote can be "undone" by an eval (i.e., each eval "undoes" the effect of exactly one quote).
Example:
 
  link l="ssi:w example.ssi";
  ring r=0,(x,y,z),ds;
  ideal i=maxideal(3);
  ideal j=x7,x2,z;
  option(prot);
  // compute i+j before writing, but not std
  write (l, quote(std(eval(i+j))));
  close(l);
  // now read it in again and evaluate:
  read(l);
==> [65535:1]1(12)s2(11)s3(10)--s(7)s(6)-----7-
==> product criterion:4 chain criterion:0
==> _[1]=z
==> _[2]=x2
==> _[3]=xy2
==> _[4]=y3
  close(l);
See Ssi links; eval; write.

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