TY - JOUR

T1 - Complete Universal Locally Finite Groups of Large Cardinality

AU - Thomas, Simon

N1 - Funding Information:
Bedford College, London, with financial assistance from the Science Research
Funding Information:
support in the form of a research fellowship in 1983/84.

PY - 1986/1/1

Y1 - 1986/1/1

N2 - This chapter discusses the complete universal locally finite (ULF) groups of large cardinality. A group G is in the class ULF of universal locally finite groups if (1) G is locally finite, (2) every finite group is isomorphic to a subgroup of G, and (3) any two isomorphic finite subgroups of G are conjugate in G. There is a countable ULF group C that is unique up to isomorphism. Every locally finite group of cardinality x is contained in a ULF group of cardinality x. Every countable locally finite group is embedded in C. Hickin's results are partially extended to arbitrary successor cardinals. Macintyre and Shelah used Ehrenfeucht–Mostowski models to construct their nonisomorphic ULF groups. The methods of Hickin and Macintyre and Shelah rely heavily on the fact that the free product with an amalgamation of two finite groups is residually finite. The chapter discusses the constricted symmetric group and proves the technical lemmas that form the heart of the construction.

AB - This chapter discusses the complete universal locally finite (ULF) groups of large cardinality. A group G is in the class ULF of universal locally finite groups if (1) G is locally finite, (2) every finite group is isomorphic to a subgroup of G, and (3) any two isomorphic finite subgroups of G are conjugate in G. There is a countable ULF group C that is unique up to isomorphism. Every locally finite group of cardinality x is contained in a ULF group of cardinality x. Every countable locally finite group is embedded in C. Hickin's results are partially extended to arbitrary successor cardinals. Macintyre and Shelah used Ehrenfeucht–Mostowski models to construct their nonisomorphic ULF groups. The methods of Hickin and Macintyre and Shelah rely heavily on the fact that the free product with an amalgamation of two finite groups is residually finite. The chapter discusses the constricted symmetric group and proves the technical lemmas that form the heart of the construction.

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U2 - 10.1016/S0049-237X(08)70467-1

DO - 10.1016/S0049-237X(08)70467-1

M3 - Article

AN - SCOPUS:77956948187

VL - 120

SP - 277

EP - 301

JO - Studies in Logic and the Foundations of Mathematics

JF - Studies in Logic and the Foundations of Mathematics

SN - 0049-237X

IS - C

ER -