In dictionaries:
zig-zag lemma
In mathematics, particularly homological algebra, the zig-zag lemma asserts the existence of a particular long exact sequence in the homology groups of certain chain complexes.
Remington Zig-Zag Derringer
The Remington Zig-Zag Derringer, or "Pepper Box", originally termed "Elliot's Pocket Revolver", was made 1861–1862 with fewer than 1,000 manufactured.
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