# Graduate Colloquium Winter 2019

McHenry Library Room 4130

Refreshments served at 3:30 in room 4161

For further information, please contact Graduate Student John McHugh or call 831-459-2969

**Wednesday January 9th, 2019**

No Seminar

**Wednesday January 16th, 2019**

No Seminar

**Wednesday January 23rd, 2019**

**Alejandro Bravo Doddoli, UCSC****Fun Math, Why Can the Child Swing Alone?**

As a young man Galileo noticed that a pendulum swings at a constant rate (at least, almost constant for small angles), since this moment the study of the pendulum became an important topic of the Mechanics. We will make a review about the history of the pendulum to finish studying the problem of a child playing in the swing. We will propose a model in order to write down the equation of motion, then we will make a qualitative study and comparison with the nature.

**Wednesday January 30th, 2019**

No Seminar

**Wednesday February 6th, 2019**

No Seminar

**Wednesday February 13th, 2019**

No Seminar

**Wednesday February 20th, 2019**

No Seminar

**Wednesday February 27th, 2019**

**Víctor Bermúdez, UCSC****The Geometry of the Tangent Bundle of a Riemannian Manifold**

I'll show how the concepts of metric, connection, geodesic flow, Hamiltonian flow, symplectic structure, and contact structure sing together under the musical isomorphism. All of these words are basic and important in differential geometry. Definitions, some formally and some intuitively, will be provided.

**Wednesday March 6th, 2019**

TBD

**Wednesday March 13th, 2019**

TBD