Seminars Digest, Vol 81, Issue 6

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Today's Topics:

1. Friday 30.01.2026 (info+seminars@itp.ac.ru)

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Message: 1
Date: Tue, 27 Jan 2026 07:02:02 +0000
From: info+seminars@itp.ac.ru
To: staff@itp.ac.ru, students@itp.ac.ru, seminars@itp.ac.ru
Subject: [Landau ITP Seminars] Friday 30.01.2026
Message-ID: <BgIsbT4rchpaWMzu1Xjv2UfvwUpBDe60nq1lgSBuUI@wwwserv2>
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Уважаемые коллеги!

На заседании Ученого совета ИТФ в пятницу 30.01 будут заслушаны 2 доклада:
14:30 П.Г. Гриневич, С. Абенда
Дивизоры Дубровина-Натанзона на MM-кривых

Классические работы по конечнозонному интегрированию уравнения Кортевега-де Фриза можно интерпретировать следующим образом. На спектральной кривой имеется g конечных циклов, на каждом из которых имеется ноль волновой функции, т.е. g точек, каждая на своей оружности. Получающийся тор есть в точности тор Лиувилля, линеаризующие движение координаты вводятся через преобразование Абеля.

При переходе к вырожденным кривым, отвечающим многосолитонным решениям, возникает необходимость уточнить понятие дивизора, при этом возникают разрешения особенностей. Нами показано, что для случая так называемых MM-кривых и дивизоров Дубровина-Натанзона на них, отвечающих вещественным регулярным многосолитонным решениям уравнения КП-2, достаточно произвести разрешения особенностей двух простейших типов.

15:30 П.Г. Гриневич, И.А. Тайманов
О возмущении спектра PT-оператора.

В последнее время публикуется большое число работ, посвящееных изучению PT-симметричных операторов и интегрируемых уравнений.

В конечнозонной теории одномерного оператора Шредингера есть два подхода: 1) Подход Матвеева-Итса, основанный на теории тета-функций Римана и 2) подход Дубровина, использующий динамику дивизоров. Недавно Тайманов написал работу, в которой проведена характеризация PT-симметричных операторов Шредингера в рамках первого подхода. В данной работе мы описываем спектральные кривые и динамику дивизоров в приближении первого порядка.

ID и пароль онлайн-трансляций в Zoom те же, что и для предыдущих трансляций семинаров и докладов на Ученом совете:
https://zoom.us/j/96899364518?pwd=MzBsR2lYT0lYL2x2b1oyNU9LeWlWUT09
Meeting ID: 968 9936 4518
Пароль: 250319

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End of Seminars Digest, Vol 81, Issue 6
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Clearest image of dark universe yet | Amazon's new satellite megaconstellation threatens future of astronomy | 'Invincible' S4 trailer announces release date

SpaceX launches Space Force GPS satellite today | Moon landings could contaminate early life clues Created for znamenski.spacecom@blogger.com | Web Version   January 26, 2026 FOLLOW US FOLLOW US   Taking you out of this world, every day SIGN UP ⋅   WEBSITE   The Launchpad The clearest view of the dark universe is here Dark energy, the mysterious force helping to drive the universe's accelerating expansion, has long eluded scientists. But now, the clearest picture yet has emerged, courtesy of the analysis of six years' worth of data collected by the Dark Energy Camera (DECam) mounted on the U.S. National Science Foundation Víctor M. Blanco 4-meter telescope.  Other news in today's roundup includes a study suggesting that the satellites in Amazon's new internet-beaming megaconstellation are bright enough to disrupt astronomical research; Moon landings could contaminate evidence about life's beginnings on Earth; and the new 'Invincible' season 4 trailer reveals the show's long-awaited release date. We have all that and more for your daily read.  Keep looking up, Kenna Content Manager, Space.com Scientists capture clearest dark-universe view yet "These results from the Dark Energy Survey shine new light on our understanding of the universe and its expansion." Read More Amazon satellites bright enough to threaten astronomy Amazon Leo satellites are generally not visible to the naked eye but still could obstruct astronomical observations. Read More Space quiz! Which scientist first suggested the universe is expanding? Click here for the answer! Isaac Newton Albert Einstein Edwin Hubble Vera Rubin   Spaceflight See SpaceX launch Space Force's GPS satellite tonight Liftoff of the GPS III-SV09 mission is scheduled for 11:46 p.m. ET tonight (Jan. 26). Read More Earthquake sensors can track falling space junk "Starlink satellites demise over the Pacific, but there is no way to actually check that out," said one researcher. Read More Science & Astronomy Moon landings could contaminate early life evidence "In the end, wherever you land, you will have contamination everywhere," one scientist noted. Read More School telescopes can boost rural astronomy access Helping young people tap into their excitement about the night sky helps them build confidence and opens career pathways they may not have considered before. Read More Entertainment 'Invincible' s4 trailer teases Guardians-Viltrumite war 'There will be loss. There will be sacrifice. We must all face judgment for the evils of our past' Read More Next 'Murderbot' book is a chaotic family road trip In an exclusive interview, bestselling author Martha Wells talks "Platform Decay," from its moral stakes to Murderbot's bitter humor. Read More Today in Space On this day: Jan. 26, 1978: International Ultraviolet Explorer launched On January 26, 1978, the International Ultraviolet Explorer launched into orbit on a mission to study ultraviolet light emitted by stars and other bright objects in the universe. Read More Our photo of day: Milky Way shines over Gemini South Sometimes astronomers don't need giant telescopes to observe the wonders of the cosmos; they just need to look up at the night sky. Read More Stay up-to-date on all things space science, news, and entertainment by subscribing to our newsletters. Sign Up   Follow SPACE Contact Us: Feedback | Advertise Sign Up | Update Profile | Unsubscribe Privacy Policy | Cookies Policy | Terms and Conditions Future US LLC © Full 7th Floor, 130 West 42nd Street, New York, NY, 10036