Summary: *Department of Humanities and Social Sciences, Polytechnic University, Brooklyn, NY 11201,
U.S.A. (e-mail: email@example.com).
Stud. Hist. Phil. Mod. Phys., Vol. 31, No. 2, pp. 201}226, 2000
2000 Elsevier Science Ltd. All rights reserved.
Printed in Great Britain
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The Coordinate-Independent 2-Component
Spinor Formalism and the Conventionality of
In recent articles, Zangari (1994) and Karakostas (1997) observe that while
an -extended version of the proper orthochronous Lorentz group Ot
exists for values of not equal to zero, no similar -extended version of its
double covering group SL(2, C) exists (where "1!2