** Gustav V Land

** Gustav Adolf Land

** Alma Schindler Mahler Gropius Werfel, Austrian wife of Gustav Mahler, Walter Gropius, and Franz Werfel ( b. 1879 )

** Gustav Ernesaks, Estonian composer and a choir conductor ( b. 1908 )

** Gustav Nezval, Czech actor ( d. 1998 )

** Gustav Stresemann, Chancellor of Germany, recipient of the Nobel Peace Prize ( b. 1878 )

** King Gustav IV Adolf of Sweden abdicates and is later exiled.

** Gustav Weigand, German linguist ( d. 1930 )

** Thirty Years ' War – Battle of Lützen – Swedish king Gustav II Adolf leads an assault on Wallenstein's army, but is killed early in the battle.

** Thirty Years ' War: Leading an army of 13. 000, king Gustav Adolf of Sweden enter the Thirty Years ' War on protestant side by making landfall at Peenemünde, Pomerania.

** Gustav Trolle, Archbishop of Uppsala ( d. 1533 )

** 1999 – 2000 Gustav Brunner

** Men's overall season champion: Gustav Thöni, Italy

** Men's overall season champion: Gustav Thöni, Italy

** Men's overall season champion: Gustav Thöni, Italy

** Men's overall season champion: Gustav Thöni, Italy

** Gustav Mahler, conductor and composer ( d. 1911 )

** ( Lars Kagg, then Carl Gustav Wrangel, obtained the county of Sölvesborg in exchanges )

** 14 July 1884-19 July 1884 Gustav Nachtigal ( b. 1834-d. 1885 )

** 5 July 1884-6 July 1884 Gustav Nachtigal ( b. 1834-d. 1885 ), the Reichskommissar for West Africa *

** Hartola ( Gustav Adolfs )

** Death of Gustav Stresemann

** Physics-James Franck, Gustav Ludwig Hertz

** Schwerer Gustav

** 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.