first countable topological space

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first countable topological space [¦fərst ′kau̇nt·ə·bəl ‚täp·ə¦läj·ə·kəl ′spās]

(mathematics)

A topological space in which every point has a countable number of open neighborhoods so that any neighborhood of this point contains one of these.

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No references found			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 Fresnel zone First Fruits of the Alps Sunday first gallery first generation computer first generation language first gust first harmonic First Horse Cavalry Army First Integral First International			First Consumers National Bank First contact First Contact Resolution first contest First Contingency Incremental Transfer Capability First Contingency Total Transfer Capability First Copy Output Time First Corinthians First Corinthians First Corporate Law Services First Correctional Medical Inc. First cosmic velocity First cosmic velocity first cost first costs First council of buddhism First Council of Constantinople First Council of Constantinople (Second Ecumenical Council) First Council of Ephesus First Council of Lyon First Council of Lyons First Council of Nicaea First Council of Nicæa First Council of Nicea First Council of the Lateran First Council of the Lateran First Council of the Vatican first countable topological space first coupon First Coupons first cousin first cousin first cousin First cousin once removed First cousin once removed First cousin once removed First cousin once-removed First cousin once-removed First cousin once-removed First cousin thrice removed First cousin thrice removed First cousin thrice removed First cousin, once removed First cousin, once removed First cousin, once removed First cousin, once-removed First cousin, once-removed First cousin, once-removed first cousins first cousins first cousins first cousins once removed first cousins once removed first cousins once removed first cousins twice removed first cousins twice removed first cousins twice removed First cover appearance

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