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Let M be a closed orientable 3-manifold. The rank of M, rk(M), is the minimum number of elements that can generate ?1(M). Clearly rk(M)?Hg(M), where Hg(M) is the Heegaard genus of M. F. Waldhausen conjectured that equality holds here, but then. [...]texto impreso
The paper deals with the entropy ideals generated by the Lorentz- Marcinkiewicz spaces of the type ? ? (?) where ? is a function parameter. The entropy ideal generated by ? ? (?) is the set of all operators between Banach spaces whose sequence o[...]texto impreso
A subset L of a complex locally convex space E is said to be locally determining at 0 for holomorphic functions if for every connected open 0-neighborhood U and every f?H(U), whenever f vanishes on U?L, then f?0. The authors' main result is that[...]texto impreso
Ansemil, José María M. ; Blasco Contreras, Fernando ; Ponte, Socorro | Università del Salento | 1997A property P of locally convex spaces is called a three-space property whenever the following implication holds: if both a closed subspace F and the corresponding quotient E/F of a locally convex space E have P then E has P as well. The authors [...]texto impreso
Here we show how, in the general context of locally convex spaces, it is possible to get an n-tensor topology (on spaces of n-tensor products) from an n-tensor topology on spaces of symmetric n-tensors products. Indeed, given an n-tensor topolog[...]
