＜＜＜「@」を「__AT__」に置き換えています＞＞＞

Date: Mon, 25 May 2026 02:26:28 +0900
To: sg-l__AT__ml.yukawa.kyoto-u.ac.jp, mugenml__AT__ml.rikkyo.ac.jp
Subject: [Sg-l:10378] 多弦数理物理学セミナー (5月28日(木)15時半、住山元基さん)
From: Masashi Hamanaka (Sg-l 経由) 

MLのみなさま

こんにちは。今週木曜日(5/28)に名大多元数理で行われる対面セミナーの情報をお知らせいたします。
セミナー開始時間が15時から15時半に変更されておりますのでご注意ください。
スライドは英語、講演は日本語の予定です。オンライン配信はございません。

なお同じ日の14時からAidan McSharryさん(ケンブリッジ)の臨時セミナーがございます。(詳しくは最下部をご参照ください)

みなさまのご参加をお待ちいたします。

はま中

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Date: ☆3:30pm☆ (JST), 28th(Thu) May. 2026

Place: Room 328, Sci. Bldg A, Nagoya University
https://www.math.nagoya-u.ac.jp/ja/direction/campus.html

Speaker: Sumiyama, Genkiさん (Kitasato U.)

Title : The Topology of Yang--Mills Instantons on Periodic Space
Reconsidered

Websites:
https://www.math.nagoya-u.ac.jp/~hamanaka/seminar.html
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Speaker:Aidan McSharry(University of Cambridge)
Date/time:28th May 2026, 14:00-15:00
Place: Sci.Bldg. A207, Nagoya U.
Title: On the third law of black hole mechanics for supersymmetric black
holes.
Abstract: Recently it has been shown that the third law of black hole
mechanics can be violated: an exactly extremal Reissner-Nordström black
hole can form in finite time in gravitational collapse of matter with a
large charge to mass ratio. However, it has also been proved that this
cannot happen if the matter satisfies a “supersymmetric” lower bound on its
energy in terms of its charge. In this talk, I will discuss these
developments, as well as extensions of this latter proof to supersymmetric
black holes with a negative cosmological constant and for such black holes
(with non-positive cosmological constant) not formed in collapse. The
proofs of these results rely on ideas related to quasi-local energy and
proofs of the positive energy theorems: these shall be discussed, and the
main theorem given as a rigidity result associated with the interior of a
“supersymmetric surface” – a concept to be introduced.