** Mountain Infantry Battalion 91

** fossil fuel: 3. 91 %

** Henry Ford sets a new automobile land speed record of 91. 37 mph.

** The U. S. Navy's Commander Leroy Heath ( the pilot ) and Lieutenant Larry Monroe ( the bombardier / navigator ) establish a world flight-altitude record of 91, 450 feet ( 27, 874 m ), with payload, in an A-5 Vigilante twinjet bomber carrying a 1, 000 kilogram payload, and they better the previous world record by over four miles ( 6 km ).

** Friday the 13th mini-crash: The Dow Jones Industrial Average plunges 190. 58 points, or 6. 91 percent, to close at 2, 569. 26, most likely after the junk bond market collapses.

** 1928 – 29, 1934 – 35, 1950 – 51, 1962 – 63, 1974 – 75, 1975 – 76, 1977 – 78, 1985 – 86, 1986 – 87, 1987 – 88, 1988 – 89, 1990 – 91, 1991 – 92, 1996 – 97, 1999 – 00, 2000 – 01, 2002 – 03, 2004 – 05, 2005 – 06, 2006 – 07, 2007 – 08

** Let the River Run-# 91

** Cyril Scott, composer, 91

** Savoia Marchetti SM. 91

**. 44 Remington Magnum: Recoil impulse of 1. 91 ms ; Recoil velocity of ; Recoil Energy of

** The Month, 19 ( 1873 ), 274 – 91

** Section 92A-exploration, development, taxation and export to other provinces of non-renewable natural resources, forestry resources and electrical energy ( subject to Parliament's authority under section 91 ( 2 ) to regulate interprovincial movements )

** C. 91 – Sonata, for violin & continuo No. 2 in A major, ( The Visitation )

** Runners – up ( 13 ): 1910 – 11 ; 1936 – 37 ; 1955 – 56 ; 1970 – 71 ; 1971 – 72 ; 1977 – 78 ; 1980 – 81 ; 1981 – 82 ; 1988 – 89 ; 1989 – 90 ; 1990 – 91 ; 1992 – 93 ; 1993 – 94

** Records of the Grand Historian ( 史記, Shǐ Jì ), compiled by Sima Qian 司馬遷 in 91 BC

** 5 KTM Class 91 ( numbers ETS 01-ETS 05 ) 6-car electric train sets by Marubeni Corporation.

** 91. 10 to gare de Saint-Quentin-en-Yvelines through gare de Massy-Palaiseau

** 91 % will have a conception ending in a live birth within four years.

** Runners-up 1990 / 91

** Winners 1990 / 91

** Description: From the United States border at Stanstead ( continues as Interstate 91 ) to Route 155 in Shawinigan

** History: The first section of what is now the A-55 was opened in 1967, serving as a continuation of the Autoroute des Cantons-de-l ' Est ( Eastern Townships Autoroute ) between Magog and Rock Island, connecting with Interstate 91.

** 2nd edition: Stuttgart: Franckhsche Verlagshandlung, 1905 18x12cm 91, 5p.

** Montserrat-ZJB, 91. 9 and 95. 5 FM

** 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.

** Well-ordering theorem: Every set can be well-ordered.

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

** Trichotomy: If two sets are given, then either they have the same cardinality, or one has a smaller cardinality than the other.

** 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.

** Every surjective function has a right inverse.

** Zorn's lemma: Every non-empty partially ordered set in which every chain ( i. e. totally ordered subset ) has an upper bound contains at least one maximal element.

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

** Tukey's lemma: Every non-empty collection of finite character has a maximal element with respect to inclusion.

** Antichain principle: Every partially ordered set has a maximal antichain.

** Every vector space has a basis.

** Every unital ring other than the trivial ring contains a maximal ideal.

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

** The closed unit ball of the dual of a normed vector space over the reals has an extreme point.

** 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.