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Front matter
JAZ volume 15 issue 3 Cover and Front matter
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- Published online by Cambridge University Press:
- 09 April 2009, pp. f1-f2
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Contents
Contents
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- Published online by Cambridge University Press:
- 09 April 2009, pp. 510-511
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Research Article
Gauge invariance of the Dirac equation
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- 09 April 2009, pp. 117-122
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The Dirac equation in its most usual form can be derived by the minimum action principle from the Lagrangian density
where γk (k =1,2,3,4) are the Dirac 4 × 4 matrices satisfying relations; 
ψ(x) is a column matrix with 4 complex elements being functions of x1, x2, x3, x4, coordinates of the pseudo-Euclidean space with metric gik.(
Back matter
JAZ volume 15 issue 2 Cover and Back matter
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- Published online by Cambridge University Press:
- 09 April 2009, pp. b1-b2
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Research Article
Double ideals in compact semirings
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- 09 April 2009, pp. 123-128
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By a topological semiring we mean a Hausdorff space S together with two continuous associative operations on S such that one (called multiplication) distributes across the other (called addition). That is, we insist that
for all x, y and z in S. Note that, in contrast to the purely algebraic situation [1,2], we do not postulate the existence of an additive identity which is a multiplicative zero.
Back matter
JAZ volume 15 issue 3 Cover and Back matter
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- Published online by Cambridge University Press:
- 09 April 2009, pp. b1-b2
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Front matter
JAZ volume 15 issue 4 Cover and Front matter
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- Published online by Cambridge University Press:
- 09 April 2009, pp. f1-f2
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Back matter
JAZ volume 15 issue 4 Cover and Back matter
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- Published online by Cambridge University Press:
- 09 April 2009, pp. b1-b2
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Front matter
JAZ volume 15 issue 1 Cover and Front matter
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- Published online by Cambridge University Press:
- 09 April 2009, pp. f1-f3
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Back matter
JAZ volume 15 issue 1 Cover and Back matter
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- Published online by Cambridge University Press:
- 09 April 2009, pp. b1-b2
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