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Douglas Harper's Etymology Dictionary
snark

imaginary animal, coined 1876 by Lewis Carroll in "The Hunting of the Snark." In 1950s, name of a type of U.S. cruise missile, and in 1980s, of a type of sailboat. Meaning "caustic, opinionated, and critical rhetoric" is from c.2002, probably from snarky and not directly related, if at all, to Lewis Carroll's use of snark.

Wiktionary
snark

Etymology 1 n. snide remarks. vb. To express oneself in a snarky fashion Etymology 2

n. 1 (context mathematics English) A graph in which every node has three branches, and the edges cannot be coloured in fewer than four colours without two edges of the same colour meeting at a point. 2 (context particle English) A fluke or unrepeatable result or detection in an experiment.

Wikipedia
Snark

Snark may be:

Snark (Lewis Carroll)

The snark is a fictional animal species created by Lewis Carroll in his nonsense poem The Hunting of the Snark. His descriptions of the creature were, in his own words, unimaginable, and he wanted that to remain so.

Snark (graph theory)

In the mathematical field of graph theory, a snark is a connected, bridgeless cubic graph with chromatic index equal to 4. In other words, it is a graph in which every vertex has three neighbors, and the edges cannot be colored by only three colors without two edges of the same color meeting at a point. (By Vizing's theorem, the chromatic index of a cubic graph is 3 or 4.) In order to avoid trivial cases, snarks are often restricted to have girth at least 5.

Writing in The Electronic Journal of Combinatorics, Miroslav ChladnĂ˝ states that

SNARK (theorem prover)

SNARK, (SRI's New Automated Reasoning Kit), is a theorem prover for multi-sorted first-order logic intended for applications in artificial intelligence and software engineering, developed at SRI International.

SNARK's principal inference mechanisms are resolution and paramodulation; in addition it offers specialized decision procedures for particular domains, e.g., a constraint solver for Allen's temporal interval logic. In contrast to many other theorem provers is fully automated (non-interactive). SNARK offers many strategic controls for adjusting its search behavior and thus tune its performance to particular applications. This, together with its use of multi-sorted logic and facilities for integrating special-purpose reasoning procedures with general-purpose inference make it particularly suited as reasoner for large sets of assertions.

SNARK is used as reasoning component in the NASA Intelligent Systems Project. It is written in Common Lisp and available under the Mozilla Public License.

Usage examples of "snark".

And all the time the Snark was rushing madly along toward Tanna, in the New Hebrides.

At every roll the Snark shook overboard a bunch or so of bananas and cocoanuts, or a basket of limes.

Even if she had brought two or three snarks, none were likely to be at full power if she had had to confine a hundred people in a burning building.

Instead, he fled, using all the speed he could muster, dodging among the trees, grateful that snarks had such a limited range.

She held the gadget tightly, too tightly for him to pry it loose without serious concentration, and she had two more snarks with her besides.

Runagate just shouted in my ear that he knows all about snarks and boojums.

All of which was too much for Wada, who went daffy, and who finally quitted the Snark on the island of Ysabel, going ashore for good in a driving rain-storm, between two attacks of fever, while threatened with pneumonia.

Somehow the Snark is losing energy by separating quarks and antiquarks along its path and making them into forward jets, just as a normal charged particle loses energy by separating electrons from atoms.

The day the Snark sailed into Suva, in the Fijis, we made out the Cambrian going out.

And yet, at the moment of writing this, Charmian is in her stateroom at the typewriter, Martin is cooking dinner, Tochigi is setting the table, Roscoe and Bert are caulking the deck, and the Snark is steering herself some five knots an hour in a rattling good sea--and the Snark is not padded, either.

In this mood of mixed apprehension and annoyance, she followed the others to the camp, where Snark put the specimens into the analyzers, and then back to the rock pile.

But there was no way we could take Pollard and the Desmonds through the swamp, keep an eye out for predators, and hope to make up any ground on the Snark -- and of course I couldn't leave them alone while we went after the Snark with Marx.

But there was no way we could take Pollard and the Desmonds through the swamp, keep an eye out for predators, and hope to make up any ground on the Snark -- and of course I couldn't leave them alone while we went after the Snark with Marx.

And the man was a little short Negro with an alto horn that Dean said obviously lived with his grandmother just like Tom Snark, slept all day and blew all night, and blew a hundred choruses before he was ready to jump for fair, and that's what he was doing.

I asked Dobby if they had given names to the kakapos on the island, and he instantly came up with four of them: Matthew, Luke, John and Snark.