MIT Free English Class is for international students, sholars, spouses. Twenty seven years ago we created a community to welcome the nations to MIT and assist with language and friendship. Join our Tuesday/Thursday conversation classes around tables inside W11-190.

The Chaplains invite you to take a brief pause for refreshments and conversation as you cross campus this month. Find us in the Stata Street on Tuesday afternoons. Look for the rocking chairs!

Join us for a rejuvenating 30-minute meditation session led by an experienced Buddhist monk.This weekly session is open to the MIT community and offers a peaceful break to manage stress, ease frustration, and enhance focus. By practicing mindfulness meditation, you'll not only boost your compassion, energy, and productivity but also connect with like-minded peers who share a passion for mental wellness. Sessions feature light meditation guidance and time for silent practice.Whether you're new to meditation or an experienced practitioner, this session provides a supportive space to cultivate inner peace and resilience. Don't miss this opportunity to recharge and foster a mindful community.

Ten minutes for your mind@2:50 every day at 2:50 pm in multiple time zones:Europa@2:50, EET, Athens, Helsinki (UTC+2) (7:50 am EST) https://us02web.zoom.us/j/88298032734Atlantica@2:50, EST, New York, Toronto (UTC-4) https://us02web.zoom.us/j/85349851047Pacifica@2:50, PST, Los Angeles, Vancouver (UTC=7) (5:50 pm EST) https://us02web.zoom.us/j/85743543699Almost everything works better again if you unplug it for a bit, including your mind. Stop by and unplug. Get the benefits of mindfulness without the fuss.@2:50 meets at the same time every single day for ten minutes of quiet together.No pre-requisite, no registration needed.Visit the website to view all @2:50 time zones each day.at250.org or at250.mit.edu

Speaker: Yoon-Joo Kim (Columbia University)Title: The Néron model of a Lagrangian fibrationAbstract:Singular fibers in minimal elliptic fibrations were classified by Kodaira and Néron in the 1960s. In his proof, Néron constructed and systematically used a special group scheme acting on an elliptic fibration. This group scheme is now called the Néron model. A Lagrangian fibration is a higher-dimensional generalization of an elliptic fibration. Néron’s theory is restricted to 1-dimensional bases, so one cannot use Néron’s original approach to study higher-dimensional Lagrangian fibrations. The higher-dimensional analog of Néron’s definition was recently proposed by David Holmes. Quite unfortunately, Holmes also showed that such a generalized Néron model often fails to exist, even in simple cases. In this talk, we show that Holmes’s generalized Néron model does exist for an arbitrary projective Lagrangian fibration of a smooth symplectic variety, under a single assumption that the Lagrangian fibration has no fully-nonreduced fibers. This generalizes Néron’s result to many higher-dimensional Lagrangian fibrations. Such a construction has several applications. First, it extends Ngô's results on Hitchin fibrations to many Lagrangian fibrations. Second, it allows Lagrangian fibrations to be considered as a minimal model-compactification of a smooth commutative group scheme-torsor. Third, it provides a tool to study birational behaviors of Lagrangian fibrations. Finally, the notion of a Tate-Shafarevich twist can be understood via the Néron model.

Speakers: Jared Speck (Vanderbilt University)Title: The Einstein-Euler Free Boundary Problem in Spherical SymmetryAbstract: I will discuss my forthcoming paper with M. Disconzi on spherically symmetric solutions to the Einstein–Euler equations. The main result is local well-posedness for a class of initial data satisfying the physical vacuum condition. Our work provides the first rigorous existence result for a model of a dynamic, self-gravitating relativistic gaseous star with compact spatial support.