Cube tronquéIn geometry, the truncated cube, or truncated hexahedron, is an Archimedean solid. It has 14 regular faces (6 octagonal and 8 triangular), 36 edges, and 24 vertices. If the truncated cube has unit edge length, its dual triakis octahedron has edges of lengths 2 and 2 + . The area A and the volume V of a truncated cube of edge length a are: The truncated cube has five special orthogonal projections, centered, on a vertex, on two types of edges, and two types of faces: triangles, and octagons.
Teredo (protocole)En informatique, le protocole Teredo, « Tunneling IPv6 over UDP through NAT » (RFC 4380), définit une méthode permettant d'accéder à l'Internet IPv6 derrière un équipement réalisant du NAT. Il fait partie des mécanismes de transition d'IPv4 vers IPv6 et consiste à encapsuler les paquets IPv6 dans des datagrammes UDP sur IPv4 entre le client et le relais Teredo, avec l'aide d'un serveur Teredo. 6to4, le protocole d'encapsulation IPv6 sur IPv4 le plus courant, nécessite que le matériel au bout du tunnel d'encapsulation ait une adresse IPv4 publique.
Cofinal (mathematics)In mathematics, a subset of a preordered set is said to be cofinal or frequent in if for every it is possible to find an element in that is "larger than " (explicitly, "larger than " means ). Cofinal subsets are very important in the theory of directed sets and nets, where “cofinal subnet” is the appropriate generalization of "subsequence".
