constant element
41Structure (mathematical logic) — In universal algebra and in model theory, a structure consists of a set along with a collection of finitary operations and relations which are defined on it. Universal algebra studies structures that generalize the algebraic structures such as… …
42HEBREW GRAMMAR — The following entry is divided into two sections: an Introduction for the non specialist and (II) a detailed survey. [i] HEBREW GRAMMAR: AN INTRODUCTION There are four main phases in the history of the Hebrew language: the biblical or classical,… …
43Insect morphology — Legend of body parts Tagmata : A Head, B Thorax, C Abdomen. 1. antenna 2. ocelli (lower) 3. ocelli (upper) 4. compound eye 5. brain (cerebral ganglia) 6. prothorax …
44Insect wing — Original veins and wing posture of a dragonfly. Hoverflies hovering to mate …
45Northern Epirus — Note: For the autonomous state formed in the region at 1914, see: Autonomous Republic of Northern Epirus. The region of Epirus, stretching across Greece and Albania. Legend grey: Approximate extent of Epirus in antiquity orange: Greek periphery… …
46Drinfel'd module — In mathematics, a Drinfel d module (or elliptic module) is roughly a special kind of module over a ring of functions on a curve over a finite field, generalizing the Carlitz module. Loosely speaking, they provide a function field analogue of… …
47Quasigroup — In mathematics, especially in abstract algebra, a quasigroup is an algebraic structure resembling a group in the sense that division is always possible. Quasigroups differ from groups mainly in that they need not be associative. A quasigroup with …
48Finitary relation — This article sets out the set theoretic notion of relation. For a more elementary point of view, see Binary relation. For a combinatorial viewpoint, see Theory of relations. For other uses, see Relation (disambiguation). In set theory and logic,… …
49Bookplate — from the books of... ] , is usually a small print or decorative label pasted into a book, often on the inside front cover, to indicate its owner. Simple typographical bookplates are termed booklabels .Bookplates typically bear a name, motto,… …
50Symphony No. 2 (Tchaikovsky) — Pyotr Ilyich Tchaikovsky composed his Symphony No. 2 in C minor, Op. 17 in 1872. One of Tchaikovsky s very joyous compositions, it was successful upon its premiere and won the favor of The Five, led by Mili Balakirev. Nevertheless, Tchaikovsky… …
