Sep

14

Tue

**Time and place**: Tuesday September 14, 10:30am in Holmes 247.

**Speaker**: Ellen Hughes, undergraduate student, UH Manoa.

**Title**: The interest equation in Lean

**Abstract**: We discuss how to solve the equation $y=x(1+i)^n$ for $i$ and for $n$ in the Lean proof assistant.

This is joint work with Monica Johnson, Ryan Sasaki and Prof. Kjos-Hanssen.

**Covid-19 mitigation plan**:

Participants will be required to show vaccination or testing status using the Lumisight app upon entry, observe 3ft social distancing, and to wear masks throughout.

Hope to see you there.

Sep

21

Tue

Title:

Computing from a pair of oracles one of which is useful

Sep

28

Tue

Title: Introduction to Modal Logic: Filtrations and Finite Model Property of $S_5$

Abstract : We’ll introduce some basic notions from Modal Logic namely, Kripke Frames, Standard Models, Filtrations etc. Then we’ll demonstrate the Finite Model Property of the system $S_5$ and this will be our main goal.

Oct

26

Tue

Speaker: B. Kjos-Hanssen

Title: Refuting a generalization of Frankl’s conjecture for lattice-like posets

## University of Hawaiʻi at Mānoa