countable sentence - countable sentence in Hindi (41-50)

	41.	The real numbers are uncountably infinite, whereas the rational numbers are countable.
	42.	Any second-countable space is a Lindel�f space, but not conversely.
	43.	In some cases, however, the base for a poset is countable.
	44.	Conversely a compact metric space is second-countable.
	45.	Many " well-behaved " spaces in mathematics are second-countable.
	46.	Note that the index set need not be countable.
	47.	One can then extend by countable additivity to the full ?-algebra.
	48.	Forcing, for example, is often explained in terms of countable models.
	49.	The countable chain condition is the & alefsym; 1-chain condition.
	50.	Natural numbers work well for representing everyday countable objects.

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