** Rossiada by Mikhail Matveyevich Kheraskov ( 1771 – 1779 )

** Vladimir by Mikhail Matveyevich Kheraskov ( 1785 )

** Eudoxia Streshneva, Tsarina of Mikhail I of Russia ( d. 1645 )

** Mikhail Saltykov-Shchedrin, Russian writer ( d. 1889 )

** Mikhail Botvinnik, Russian chess player ( d. 1995 )

** Mikhail Zadornov, Russian stand-up comedian and writer

** Mikhail Kovalchuk, Russian physicist and official

** Cold War: Soviet troops occupy Baku, Azerbaijan, under the state of emergency decree issued by Soviet premier Mikhail Gorbachev and kill over 130 and wound over 700 protesters for national independence.

** Mikhail Gorbachev arrives in Ottawa for a 29-hour visit.

** Cold War: U. S. President George H. W. Bush and Soviet Union leader Mikhail Gorbachev sign a treaty to end chemical weapon production and begin destroying their respective stocks.

** Cold War: Soviet Union leader Mikhail Gorbachev is awarded the Nobel Peace Prize for his efforts to lessen Cold War tensions and reform his nation.

** Mikhail Kalashnikov, Russian firearms inventor

** Mikhail Tal, eighth World Chess Champion ( b. 1936 )

** The Soviet Union begins its program of economic restructuring ( perestroika ) with legislation initiated by Premier Mikhail Gorbachev ( though Gorbachev had begun minor restructuring in 1985 ).

** Mikhail Gorbachev resigns as president of the Soviet Union, from which most republics have already seceded, anticipating the dissolution of the 74-year-old state.

** The Intermediate-Range Nuclear Forces Treaty is signed in Washington, D. C. by U. S. President Ronald Reagan and Soviet leader Mikhail Gorbachev.

** The Soviet liner Mikhail Lermontov sinks in the Marlborough Sounds, New Zealand.

** Mikhail Skobelev, Russian general ( b. 1843 )

** Mikhail Bulgakov, Russian writer ( d. 1940 )

** May 28, 1812 – Russian Field Marshal Mikhail Kutuzov signs the Treaty of Bucharest, ending the Russo-Turkish War, 1806 – 1812 and making Bessarabia a part of Imperial Russia.

** Mikhail Gorbachev becomes General Secretary of the Soviet Communist Party and de facto leader of the Soviet Union.

** Mikhail Gorbachev visits China, the first Soviet leader to do so since the 1960s.

** In a meeting with Pope John Paul II, President of the Soviet Union Mikhail Gorbachev pledges greater religious freedom for citizens of the Soviet Union.

** Cold War: In a meeting off the coast of Malta, U. S. President George H. W. Bush and Soviet leader Mikhail Gorbachev release statements indicating that the Cold War between their nations may be coming to an end.

** U. S. President Bush and Soviet President Gorbachev meet in Helsinki to discuss the Persian Gulf crisis.

** Bill Clinton, Mikhail Gorbachev & Sophia Loren for Prokofiev: Peter and the Wolf / Beintus: Wolf Tracks music performed by the Russian National Orchestra conducted by Kent Nagano

** 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.