BASIC NOTIONS SEMINAR - Thursday 2 May, at 16:00 - Ton Marar - VENUE: ICTP Luigi Stasi seminar room

[ICTP Math Section]

_BASIC  NOTIONS SEMINAR_


Thursday 2 May, at 16:00


VENUE: Luigi Stasi seminar room (In-Person)

Online attendees:
https://zoom.us/j/91404037169?pwd=bVd3YXh5ZUNkN2t2Z1o0MFpuUmo1Zz09

Meeting ID: 914 0403 7169
Passcode: 707534


Speaker: Ton Marar (Universidade de São Paulo, ICMC - São Carlos, Brazil)


Title: Whitney and his umbrella


Abstract:

Hassler Whitney once said: /The singularities of a general smooth 
mapping from a surface into  R^3  may be quite wild. But a slight 
alteration of the map will reduce the singularities to a single type./


The new map is called/semiregular/ and the tame singularity is called a 
/Whitney umbrella./


We call the images of semiregular maps /singular surfaces./ We explore 
the interplay between a reduced defining equation F(X,Y,Z)=0 and a 
parametrization φ : R^2 → R^3  of a singular surface.


/https://indico.ictp.it/event/10696/
/


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