... Committee¹

The Library Committee of the Association of Mizar Users maintains the Mizar Mathematical Library and coordinates activities concerning improvement of the library.

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...MIZAR²

Mizar is a star; $\zeta$ in Ursa Major.

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... QED³

http://www-unix.mcs.anl.gov/qed/

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... identifiers⁴

Each MIZAR article, besides regular title, has an identifier which is used when referring to it.

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... WAYBEL⁵

The way below relation is the key concept in continuous lattices - it is used to characterize continuous lattices.

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