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On the form of principal torus-bundles over toruses. (English) Zbl 0297.57017

MSC:

57S25 Groups acting on specific manifolds
22E25 Nilpotent and solvable Lie groups
57Q05 General topology of complexes
57M05 Fundamental group, presentations, free differential calculus
55R10 Fiber bundles in algebraic topology
57R20 Characteristic classes and numbers in differential topology
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