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Asymptotic theory of set partitions: a representation theory agenda
20181024

Speaker: Jocelyn Lochon (Univ. Lisboa)

See the attached file....



3manifolds, knots and surfaces
20181024

Speaker: João Miguel Nogueira (CMUC, Univ. Coimbra)

We will survey the motivation and history of 3manifold topology, together with its twin subject of knot theory, giving special emphasis to the importance of surfaces on the understanding of these subjects. Under this framework, we will also review contributions of the speaker as suitable. ...



The existence theorem of weak solution for the initialboundary problem for Oskolkov's system of equations
20181026

Speaker: Mikhail Turbin (Voronezh State Univ., Russia)

In the talk, the existence of weak solutions of the initialboundary value problem describing the motion of weakly concentrated aqueous solutions of polymers (Oskolkov's system) is proved. The proof is based on the approximationtopological approach. On the first step, the operator equation...



What is ... Pointfree Topology?
20181031

Speaker: Jorge Picado (CMUC, Univ. Coimbra)

Pointfree topology deals with frames and locales, the pointfree counterparts of topological spaces. We shall present motivation for this approach to topology and its basic features and facts. We will emphasize some of the main differences between the two approaches and some advantages of the...



TBA
20181107

Speaker: Alfredo Costa (CMUC, Univ. Coimbra)

TBA...



TBA
20181109

Speaker: Amílcar Branquinho (CMUC, Univ. Coimbra)

TBA...



On the existence of solutions for inextensible string equations
20181114

Speaker: Ayk Telciyan (UCUP PhD programme student)

In talk thesis, we analyze existence of solutions for inextensible string equations. In particular, we have results in two directions.On one hand, we find explicit traveling wave solutions for a system of hyperbolic conservation laws resulting from inextensible string equations via suitable change...



TBA
20181116

Speaker: Christian Lomp (CMUP, Univ Porto)

TBA...



Geometry of mechanical control systems with applications
20181121

Speaker: Sandra Isabel Ventura Ricardo (UTAD, Vila Real)

In this talk, a geometric setting for studying mechanical control systems is presented. A special class is distinguished: the class of geodesically accessible mechanical systems, for which the uniqueness of the mechanical structure is guaranteed (up to an extended point transformation). Nonlinear...



Categories, Allegories
20181121

Speaker: Igor Arrieta (UCUP PhD programme student)

A binary relation from a set A to a set B is a subset of the cartesian product AxB. Moreover, a function f: A>B can be identified with a particular type of relation, namely the relation consisting of pairs (x,f(x)). Consequently, the usual category of sets can be regarded as a subcategory of...



Representations of fundamental groups of surfaces
20181123

Speaker: Peter Gothen (CMUP, Univ Porto)

We consider representations of the fundamental group of a closed surface in the group SL(2,R). To each such representation one can associate an integer invariant called the Toledo invariant. A theorem of J. Milnor says that the absolute value of the Toledo invariant is less than or equal to g1,...



TBA
20181128

Speaker: Adérito Araújo (CMUC, Univ, Coimbra)

TBA...



Kippenhahn's Theorem
20181128

Speaker: Stephan Weis (CMUC)

The numerical range of a matrix is a convex subset of the plane of complex numbers (Toeplitz 1919, Hausdorff 1919) and equals the convex hull of a real algebraic curve (Kippenhahn 1951, Chien and Nakazato 2010). An interesting higherdimensional analogue would be to write the joint algebraic...



TBA
20181205

Speaker: Ivan Yudin (CMUC, Univ. Coimbra)

TBA...


