Biasi C., de Mattos D.'s A Borsuk-Ulam Theorem for compact Lie group actions PDF

By Biasi C., de Mattos D.

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Example text

Therefore, PN(v) in a clause inserted by means of a mixed link is always 3s. Every ULPS cut that consists at least of a v pole, has got 3s as PN values: V v o \ vo) 3s Also, 3» without having a contradiction in the difference of PN between the only piece of the ULPS and the global ULPS. In what concerns ~£{ULPS), it is always equal to q. In every ULPS cut that consists at least of a ( v J pole, l(ULPS) = q: s v o SV O This implies the existence of cut structures, of the following form: 23 v V ' r-i q Only a ghost will be able to change the level assignment of a ULPS.

24 In what follows we will study the new syntactic structures which have apppear by means of these operations, arranging a first classification between objectivization and subjectivization which is the linguistic referent of the recombination of mixed systems. The differences caused by the appearance of ghosts will be included in this section. Then, we will review the very diverse generative power of each of the results. 1 Rules that cause ghosts Rule 1 x = SUM, y = s'v'o', (){x,y) = sv(s'v'o')0 1 Since the group (s'v'o ) is taking the focal place of o in the variable 0, we have l(s'v'o') = l(o), that is, x= SVLQ, y = s'v'o', Q{x,y) = sv(s'v'o')i0 In order to join the two structures, every time when s' € Z, it is necessary to have a level assigner ghost.

The < fc-loop excision defined by: lpe |v| < k}. • the > fc-loop excision defined by: /pe>fc(z) = {uxy | 2 = uvx£,(v)y, for some u,y £ V*, |a;| > |f | > /s}. If z is loop-free, then lpex(z) = 0 for all X £ UA:>I{< A;, A;, > A*}. The above operations can be extended to languages in a natural way: hpex [L) =\J hpex [w), W lpex (L) = [J lpex (w), W for all X £ U/c>i{< k, k, > k}. A family of languages T is said to be a full trio if it is closed under morphisms, inverse morphisms, and intersection with regular sets.

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A Borsuk-Ulam Theorem for compact Lie group actions by Biasi C., de Mattos D.


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