Internal and External Direct Product
See also: Internal direct sumSome authors draw a distinction between an internal direct product and an external direct product. If and, then we say that X is an internal direct product (of A and B); if A and B are not subobjects, then we say that this is an external direct product.
Read more about this topic: Direct Product
Famous quotes containing the words internal, external, direct and/or product:
“No real “vital” character in fiction is altogether a conscious construction of the author. On the contrary, it may be a sort of parasitic growth upon the author’s personality, developing by internal necessity as much as by external addition.”
—T.S. (Thomas Stearns)
“Many are poets but without the name,
For what is poesy but to create
From overfeeling good or ill; and aim
At an external life beyond our fate,
And be the new Prometheus of new men.”
—George Gordon Noel Byron (1788–1824)
“An inexperienced heraldist resembles a medieval traveler who brings back from the East the faunal fantasies influenced by the domestic bestiary he possessed all along rather than by the results of direct zoological exploration.”
—Vladimir Nabokov (1899–1977)
“In fast-moving, progress-conscious America, the consumer expects to be dizzied by progress. If he could completely understand advertising jargon he would be badly disappointed. The half-intelligibility which we expect, or even hope, to find in the latest product language personally reassures each of us that progress is being made: that the pace exceeds our ability to follow.”
—Daniel J. Boorstin (b. 1914)