lower set
A second or new burnishing
(chemistry) A salt or ester of pinic acid.
(mathematics, order theory) A subset of a poset which contains any descending chain which starts at any element of itself.
An area of Bolton, Greater Manchester, England (OS grid ref SD705105). / A habitational surname from Old English.
ある部分集合が下集合であるかどうかを確かめるには、ある要素を含むならその要素より小さいすべての要素も含むことを確認すればよい。
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DiQt
Free
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