Articles

• Classification of obstruction for separation of semialgebraic sets in dimension 3

  F. Acquistapace, C. Andradas, F. Broglia

  27

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• Inner metric properties of 2-dimensional semi-algebraic sets

  M. Kuppe, W. Scheufler, L. Bröcker

  51

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• Morphisms of Klein surface

  F.J. Cirre

  79

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• Around real Enriques surfaces

  Viatcheslav Kharlamov, Alexander Degtyarev

  93

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• Complete decomposability ofq uotients by complex conjugation for real complete intersection surfaces

  S.M. Finashin

  111

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• Multivariate Sturm-Habicht sequences:realroot counting on n-rectangles and triangles

  Guadalupe Trujillo, Laureano González-vega

  119

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• Topology of real algehraic - surfaces

  Ilia Itenberg

  131

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• On Witt rings of funetion fields of real analytic surfaces and Curve

  Piotr Jaworski

  153

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• Distance géodésique sur un sous-analytique

  Krzysztof Kurdyka, Patrice Orro

  173

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• Semi-algebraic complexity-additive complexity of diagonalization of quadratic forms

  Klaus Meer, Thomas Lickteig

  183

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• A failure of quantifier elimination

  David Marker, Angus Macintyre

  209

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• Separating ideals in dimension 3

  James J. Madden, Niels Schwartz

  217

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• Levelled 0-minimal structures

  David Marker, Chris Miller

  241

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• The nonreduced order spectrum of ac ommutative ring

  James Mcenerney, Gilbert Stengle

  251

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• Periodic solitons and real algebrale curves

  S.M. Natanzon

  277

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• A really elementary proof of real Lüroth theorem

  J.R. Sendra, T. Recio

  283

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• Optimal degree construction of real algebraic plane nodal curves with prescribed topology, I: the oríentable case

  Francisco Santos

  291

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