08-06 Proceedings, conferences, collections, etc.

08Axx Algebraic structures [See also <a href="#code:03C05">03C05</a>]

08A02 Relational systems, laws of composition

08A40 Operations, polynomials, primal algebras

08A70 Applications of universal algebra in computer science

08A99 None of the above, but in this section

08Bxx Varieties [See also <a href="#code:03C05">03C05</a>]

08B05 Equational logic, Mal′cev (Mal′tsev) conditions

08B10 Congruence modularity, congruence distributivity

08B25 Products, amalgamated products, and other kinds of limits and colimits [See also <a href="#code:18A30">18A30</a>]

08B26 Subdirect products and subdirect irreducibility

08B99 None of the above, but in this section

08C05 Categories of algebras [See also <a href="#code:18C05">18C05</a>]

08C10 Axiomatic model classes [See also <a href="#code:03Cxx">03Cxx</a>, in particular <a href="#code:03C60">03C60</a>]

08C20 Natural dualities for classes of algebras [See also <a href="#code:06E15">06E15</a>, <a href="#code:18A40">18A40</a>, <a href="#code:22A30">22A30</a>]

08C99 None of the above, but in this section

11-00 General reference works (handbooks, dictionaries, bibliographies, etc.)

11-01 Instructional exposition (textbooks, tutorial papers, etc.)

11-02 Research exposition (monographs, survey articles)

11-03 Historical (must also be assigned at least one classification number from Section 01)

11-04 Explicit machine computation and programs (not the theory of computation or programming)

11-06 Proceedings, conferences, collections, etc.

11Axx Elementary number theory {For analogues in number fields, see <a href="#code:11R04">11R04</a>}

11A05 Multiplicative structure; Euclidean algorithm; greatest common divisors

11A07 Congruences; primitive roots; residue systems

11A25 Arithmetic functions; related numbers; inversion formulas

11A55 Continued fractions {For approximation results, see <a href="#code:11J70">11J70</a>} [See also <a href="#code:11K50">11K50</a>, <a href="#code:30B70">30B70</a>, <a href="#code:40A15">40A15</a>]