concave
71concave lens — noun a lens such that a parallel beam of light passing through it is caused to diverge or spread out • Syn: ↑diverging lens • Hypernyms: ↑lens, ↑lense, ↑lens system …
72concave polygon — noun a polygon such that there is a straight line that cuts it in four or more points • Ant: ↑convex polygon • Hypernyms: ↑polygon, ↑polygonal shape • Hyponyms: ↑reentrant polygon, ↑reentering polygon * * …
73plan-concave — [ plɑ̃kɔ̃kav ] adj. • 1765; de 1. plan et concave ♦ Opt. Qui présente une face plane et une face concave. Lentilles plan concaves. ● plan concave, plan concaves adjectif Dont une face est plane et l autre concave. plan concave adj. OPT Qui a une… …
74Convex and concave polygons — An example of a convex polygon: a regular pentagon In geometry, a polygon can be either convex or concave (non convex). Contents 1 Convex polygons …
75Logarithmically concave function — A function f : R^n o R^+ is logarithmically concave (or log concave for short), if its natural logarithm ln(f(x)), is concave. Note that we allow here concave functions to take value infty. Every concave function is log concave, however the… …
76Logarithmically concave measure — In mathematics, A Borel measure mu; on n dimensional Euclidean space R n is called logarithmically concave (or log concave for short) if, for any compact subsets A and B of R n and 0 lt; lambda; lt; 1, one has: mu(lambda A + (1 lambda) B) geq… …
77Convex and Concave — Artist M. C. Escher Year 1955 Type lithograph Dimensions 27.5 cm × 33.5 cm (10.8 in × 13.2 in) Convex an …
78Plano-concave — Pla no con cave, a. [Plano + concave.] Plane or flat on one side, and concave on the other; as, a plano concave lens. See {Lens}. [1913 Webster] …
79Fonction concave — Cet article court présente un sujet plus développé dans : Fonction convexe. Une fonction f est dite concave lorsque la fonction opposée − f est convexe. Le fait que l on préfère parler de fonction convexe plutôt que de fonction concave… …
80réseau concave — įgaubtoji difrakcinė gardelė statusas T sritis fizika atitikmenys: angl. concave grating; concave reflection grating vok. Hohlgitter, n; Konkavgitter, n rus. вогнутая дифракционная решётка, f pranc. réseau concave, m; réseau de diffraction… …
