(topology) The topology of the Cartesian product of two or more topological spaces which is generated from a basis whose elements are Cartesian products of open subsets of the original spaces, such that for each such Cartesian product only a finite quantity of such subsets are proper.

plural of natural product

(chemistry, physics) The product of the individual solubilities of the cation and anion of a salt

(politics) According to Marxist theory, the chaotic and volatile nature of all commodity production based on private property, as opposed to planned economies.

plural of exterior product

(algebra) A kind of product between vectors and/or multivectors which is associative, linear, and alternating.

(mathematics) An infinite product that approximates half of pi: 𝜋/2=∏ₙ₌₁ ᪲(4n²)/(4n²-1)=∏ₙ₌₁ ᪲((2n)/(2n-1)·(2n)/(2n+1))\[6pt]= Big (2/1·2/3 Big )· Big (4/3·4/5 Big )· Big (6/5·6/7 Big )· Big (8/7·8/9 Big )·;⋯\.

Any product derived from the trees or bushes of a forest, such as logs, timber, lumber, wood pulp, sawdust, bark mulch, leaf mulch, forage, or feedstocks.

plural of forest product

(historical) The basic accounting and farm production unit in the people's commune system of the People's Republic of China.