first category

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first category [′fərst ′kad·ə‚gȯr·ē]

(mathematics)

A set is of first category if it is a countable union of nowhere dense sets.

A setSis of first category at a pointxif there is a neighborhood ofxwhose intersection withSis of first category.

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No references found			The first category is always the man of the present, the second the man of the future. Crime And Punishment by Dostoyevsky, Fyodor View in context			Firozabad Firozpur firring Firs Aleksandrovich Shevelev Firs Efimovich Shishigin Firs Sergeevich Zhuravlev Firs Shevelev Firs Shishigin Firs Zhuravlev Firsov, Anatolii Firsov, Anatolii Vasilevich Firsov, Ivan Firsov, Nikolai Firsov, Nikolai Nikolaevich first First Aid First All-Russian Congress of Soviets of Peasants Deputies First All-Russian Congress of Soviets of Workers and Soldiers Deputies First All-Union Congress of Shock Brigades first answer print first arrival First Baron Raglan First Baron Tedder first boot sequence first bottom first category first cause first class first class module first coat First Conference of the Military and Combat Organizations of the First Conference of the Russian Social Democratic Labor Party First Congress of Soviets of the Union of Soviet Socialist Republics First Congress of the Russian Social Democratic Labor Party first cost first countable topological space First Day of Summer first derivative first derived curve first detector First Earl Wavell First Empire first estimate-second estimate method First Families of Virginia first filial generation first fire first fire composition First Fit first fixings first floor First Foot Day			first byte in browser First call First call date First Call Dates First Call for Help First Call Historical Database First Call Opportunity First Call Resolution First Call Resolution Rate First Calls First Canadian Barter Exchange, Inc. First Canadian Funds, Inc. First Capital Equities Limited First Capital Mortgage Group First Capital Mutual Fund Limited First Capital Property Group First Capital Securities Limited First Carolina Corporate Credit Union First Carolina Investors, Inc. First Carolina Real Estate Services, LLC First Cash Financial Services First Castle Federal Credit Union First Cat Of The USA First catch your hare first category First Catholic Federal Credit Union First Catholic Slovak Ladies Association First Catholic Slovak Union first cause first cause first cause First cause argument First cause argument First Causes First Causes First Causes First Cavite Industrial Estate First Century Bank First Certificate in English First cervical nerve first chair First chamber first charge First Charter Corporation First Charter Insurance Services, Inc First Chicago Bank First Children's Embassy in the World First Chinese Baptist Church First Choice Business Machines First Choice Communication Inc. First Choice Credit Union First Choice Health Administrator First Choice Health Network First Choice Home Inspections

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