** X register and Y register-They are number stores where numbers are stored temporarily while doing calculations.

** hypernyms: Y is a hypernym of X if every X is a ( kind of ) Y ( canine is a hypernym of dog )

** coordinate terms: Y is a coordinate term of X if X and Y share a hypernym ( wolf is a coordinate term of dog, and dog is a coordinate term of wolf )

** holonym: Y is a holonym of X if X is a part of Y ( building is a holonym of window )

** meronym: Y is a meronym of X if Y is a part of X ( window is a meronym of building )

** hypernym: the verb Y is a hypernym of the verb X if the activity X is a ( kind of ) Y ( to perceive is an hypernym of to listen )

** troponym: the verb Y is a troponym of the verb X if the activity Y is doing X in some manner ( to lisp is a troponym of to talk )

** entailment: the verb Y is entailed by X if by doing X you must be doing Y ( to sleep is entailed by to snore )

** T. Y. Lin, Chinese-born civil engineer ( d. 2003 )

** Felix Y. Manalo, First Filipino Executive Minister of the Iglesia ni Cristo ( b. 1886 )

** Y Bandana ( album ), their self-titled debut album.

** Y

** Ahmad Y. al-Hassan and Donald Routledge Hill, Islamic Technology: An Illustrated History

** X < sub > 1 </ sub >, X < sub > 2 </ sub >, X < sub > 3 </ sub >, ... are conditionally independent given Y, and

** Queen Latifah for " U. N. I. T. Y.

** 42 points – New England 45, N. Y.

** Eunectes murinus, the green anaconda, the largest species, is found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and on the island of Trinidad.

** Eunectes notaeus, the yellow anaconda, a smaller species, is found in eastern Bolivia, southern Brazil, Paraguay and northeastern Argentina.

** Eunectes deschauenseei, the dark-spotted anaconda, is a rare species found in northeastern Brazil and coastal French Guiana.

** Eunectes beniensis, the Bolivian anaconda, the most recently defined species, is found in the Departments of Beni and Pando in Bolivia.

** Tarski's theorem: For every infinite set A, there is a bijective map between the sets A and A × A.

** The Cartesian product of any family of nonempty sets is nonempty.

** König's theorem: Colloquially, the sum of a sequence of cardinals is strictly less than the product of a sequence of larger cardinals.

** Hausdorff maximal principle: In any partially ordered set, every totally ordered subset is contained in a maximal totally ordered subset.

** For every non-empty set S there is a binary operation defined on S that makes it a group.

** Tychonoff's theorem stating that every product of compact topological spaces is compact.

** In the product topology, the closure of a product of subsets is equal to the product of the closures.

** If S is a set of sentences of first-order logic and B is a consistent subset of S, then B is included in a set that is maximal among consistent subsets of S. The special case where S is the set of all first-order sentences in a given signature is weaker, equivalent to the Boolean prime ideal theorem ; see the section " Weaker forms " below.

** Any union of countably many countable sets is itself countable.

** If the set A is infinite, then there exists an injection from the natural numbers N to A ( see Dedekind infinite ).

** Every infinite game in which is a Borel subset of Baire space is determined.

** The Vitali theorem on the existence of non-measurable sets which states that there is a subset of the real numbers that is not Lebesgue measurable.

** The Lebesgue measure of a countable disjoint union of measurable sets is equal to the sum of the measures of the individual sets.

** The Nielsen – Schreier theorem, that every subgroup of a free group is free.

** Pope Pius X

** X is reflexive.

** for all f in X ′ there exists x in X with ǁxǁ ≤ 1, so that f ( x ) = ǁfǁ.

** Louis X ( 1314 – 1316 )

** Charles X ( 1824 – 1830 )

** Console ( Mac OS X ), a log viewer on OS X

** Louis X the Quarreller, 1314 – 1316

** Leather Goddesses of Phobos 2: Gas Pump Girls Meet the Pulsating Inconvenience from Planet X!

** 2007 – 2009 X

** XNU, from the Mac OS X operating systems

** Knuth's Algorithm X

** X PixMap for portable icons

** Mac OS X Calculator

** Planet X < sup > 1 </ sup >

** publickey: a method for public key-based authentication, usually supporting at least DSA or RSA keypairs, with other implementations also supporting X. 509 certificates.

** If O takes center ( best move for him ), X should take the corner opposite the original, and proceed as detailed above.

** If O plays a corner or side-middle first, X is guaranteed to win:

** Ogg ( Vorbis ) vs. Lame ( MP3 )-a comparison at 128 .. 350kbit / s, Vorbis_1. 0beta4 X Lame_3. 88, year 2001

A space X can be embedded into the double dual X ** by

Thus T: X → X ** is an injective linear mapping, though it is not surjective unless X is reflexive.