# Seminars

## TODAY

Code-Assisted Music Composition with Python and Logic Pro X

Speacker: Marcelo Cicconet - Harvard University
Fri 22 Feb 2019, 13:30 - Auditorio 3Computer Graphics

Abstract: In this talk I will present experiments on how to integrate the power and flexibility of a general purpose programming language (Python, running on Jupyter) with the stability and extensive sound and effects library of a modern digital audio workstation (Logic Pro X) to compose an electronic dance music track. I will introduce and use simple music theory concepts to generate chord progression, bass line, arpeggios and other musical elements, which will be recorded in Logic via MIDI, using Logic's MIDI Clock messages for synchronization. The main advantage of using Python is the fact that it is popular and general-purpose -- there's no need to learn a specific music-related programming language. The main advantage of sending algorithmically-generated music to Logic is that this environment holds a comprehensive library of sounds and effects that allow fully producing a music piece into a professional-sounding track. I will present one such track, composed specially for this talk using some of the algorithms to be discussed.

## UPCOMING

Conformal immersion of Riemannian products in low codimension.

Speacker: Felippe Soares Guimarães - IMPA
Tue 26 Feb 2019, 15:30 - Sala 236Differential Geometry

Abstract: The simplest way to constructing an immersion of a product manifold into a Euclidean space is to take an extrinsic product of immersions, that is, a product of immersions of each factor of the product manifold. Thus, a natural problem is to provide sufficient conditions for an immersion of a product manifold to be decomposed in an extrinsic product. In this talk, we will discuss about a work (and a conjecture) due to Moore and our recent contribution (Joint work with Bruno Mendonça) for conformal immersions of Riemannian products.

VR Kino+Theater : The Tempest

Speacker: Luiz Velho - IMPA
Wed 27 Feb 2019, 13:30 - Auditorio 3Computer Graphics

Abstract: We present VR Kino+Theater, a platform that integrates traditional forms of entertainment (theater and cinema), with advanced interactive media, (virtual reality and gaming).

The foundations of our plataform lies onto three pillars related to technology, production, and delivery aspects which are the directions for the future media. The operation of such ecosystem entails new roles for producers, performers and participants.

We also show "The Tempest", an experiment based on the Shakespeare’s play that was produced as a proof-of-concept of the VR Kino+Theater platform.

Probability in Number theory : Erdös Covering Systems

Speacker: Julian Sahasrabudhe - Cambridge and IMPA
Wed 27 Feb 2019, 15:30 - Sala 349Probability and Combinatorics

Abstract: If $A_1,\ldots,A_n$ are arithmetic progressions $A_i = d_i\Z + a_i$, we say that $A_1,\ldots,A_n$form a \emph{covering system} if $\bigcup_i^n A_i = \mathbb Z$. Since their introduction in 1950 by Erdös, the subjectof covering systems has given rise to several attractive results and conjectures.For example, Hough proved (and thereby resolving a long-standing conjecture of Erdös) that one cannot coverthe integers with arithmetic progressions $A_1,\ldots,A_n$ with \emph{distinct} differences $d_1< \cdots <d_n$ if the smallest difference is $> 10^{16}$.In this talk, I will discuss the resolution of some further conjectures on covering systems.This is joint work with Paul Balister, Béla Bollobás, Rob Morris and Marius Tiba.

VR Tour : After The Tempest

Speacker: Luiz Velho - IMPA
Wed 27 Feb 2019, 18:00 - Auditorio 3Computer Graphics

Abstract: VR Tour is a technological platform for the exploration of content in virtual reality. We present the core concepts of our platform followed by the conceptual and technical infrastructure which enables it.

We also show "After The Tempest", a live performance of a new media experiment demonstrating our latest research in this area.