Alexander Kasprzyk

@uniofnottingham.bsky.social is closing courses, slashing research funding, and making staff redundant (with a whopping £85m hole in their finances) and all the while somehow the number of top earners is increasing significantly. It just doesn’t seem justifiable.

Nottingham cuts ‘threaten status as research-intensive university’ Move to reduce academics’ protected research time to 25 per cent brings union warning Academics at the University of Nottingham have warned that its status as a research-intensive institution is under threat from proposals to cut protected research time. Nottingham is going through the second phase of a restructuring programme in response to financial pressure. That has already prompted pushback against the suspension of recruitment to, and the potential closure of, courses including music, languages and nursing.

"Move to reduce academics’ protected research time to 25 per cent brings union warning ... that its status as a research-intensive institution is under threat"
@uniofnottingham.bsky.social
www.researchprofessionalnews.com/rr-news-uk-u...

A Generalization of the Murnaghan–Nakayama Rule for K-k-Schur and k-Schur Functions The K-k-Schur functions and k-Schur functions appeared in the study of K-theoretic and affine Schubert Calculus as polynomial representatives of Schubert classes. In this paper, we introduce a new family of symmetric functions \mathcal{F}_\lambda^{(k)}⁠, that generalizes the constructions via the Pieri rule of K-k-Schur functions and k-Schur functions. Then we obtain the Murnaghan–Nakayama rule for the generalized functions. The rule is described explicitly in the cases of K-k-Schur functions and k-Schur functions, with concrete descriptions and algorithms for coefficients. Our work recovers the result of Bandlow, Schilling, and Zabrocki for k-Schur functions, and explains it as a degeneration of the rule for K-k-Schur functions. In particular, many other special cases and connections promise to be detailed in the future.

This work by Duc-Khanh Nguyen was published in International Mathematics Research Notices.
academic.oup.com/imrn/article...

Duc-Khanh Nguyen (Albany)16 February 2023"A generalization of the Murnaghan-Nakayama rule for K-k-Schur and k-Schur functions"We introduce a generalization o... Duc-Khanh Nguyen (Albany)

Duc-Khanh Nguyen (Albany) speaking on "A generalization of the Murnaghan-Nakayama rule for K-k-Schur and k-Schur functions" at our #AlgebraicGeometry #Math seminar back in February 2023. #MathSky

arXiv papers for Gianni Petrella

Check out Gianni's work on the arXiv. #QuiverModuli #AlgebraicGeometry #RepresentationTheory
arxiv.org/search/?quer...

Gianni Petrella Personal website of Gianni Petrella, a mathematician at the University of Luxembourg.

Gianni Petrella (Luxemburg) is visiting me for the next month. Gianni is a student of @pbelmans.bsky.social and an expert in quiver moduli. It's a great pleasure to have him in Warwick.
giannipetrella.eu

Invariance of plurigenera fails in positive and mixed characteristic We construct smooth families of elliptic surface pairs with terminal singularities over a DVR of positive or mixed characteristic $(X,B)\to \mathrm{Spec}R$, such that $P_m(X_k,B_k)>P_m(X_K,B_K)$ for…

For more details see Iacopo Brivio's arXiv preprint.
arxiv.org/abs/2011.10226

Iacopo Brivio (NCTS)9 February 2023"Invariance of plurigenera and KSBA moduli in positive and mixed characteristic"A famous theorem by Siu states that plurig... Iacopo Brivio (NCTS)

Iacopo Brivio (NCTS) speaking on "Invariance of plurigenera and KSBA moduli in positive and mixed characteristic" at our #AlgebraicGeometry #Math seminar back in February 2023. #MathSky

A screenshot of an article from ResearchProfessional News with the headline "Nottingham cuts 'theatre status as research-intensive university'"

A screenshot of an article from the BBC with the headline "Unions pass no confidence vote in university bosses'"

A screenshot of an article from NottinghamshireLive with the headline "'Breakdown of trust' at University of Nottingham as Vice Chancellor told to quit'"

Hey! We're in the news again! And if the University believes that all press is good press, they're nailing it.

'Breakdown of trust' at University of Nottingham as Vice Chancellor told to quit The Vice Chancellor previously said the actions she was taking were having a 'positive impact'

"This unprecedented move reflects a complete breakdown of trust in the university [of Nottingham]'s senior leadership following years of shocking financial decisions and governance failures." @uniofnottingham.bsky.social

Unions pass no confidence vote in University of Nottingham bosses They say it follows "years of shocking financial decisions and governance failures".

"Union members at the University of Nottingham have passed a motion of no confidence in the vice-chancellor and other senior leaders after a 'complete breakdown of trust'." @uniofnottingham.bsky.social

Yaoxiong Wen (KIAS)2 February 2023"Mirror symmetry for the parabolic G-Higgs bundle, from local to global"Motivated by geometric Langlands, we initiate a pro... Yaoxiong Wen (KIAS)

Yaoxiong Wen (KIAS) speaking on "Mirror symmetry for the parabolic G-Higgs bundle, from local to global" at our #AlgebraicGeometry #Math seminar back in February 2023. #MathSky

"Breakdown of trust' at University of Nottingham as Vice Chancellor told to quit".

Ukrainians gathered in front of the Natiinal Gallery, London, marking the 4th anniversary of Russia's full-scale invasion.

Trafalgar Square, 24.2 26.

In an unprecedented move, one reflective of the deeply unprecedented times at our university, UoN branches of three different unions (@UCU.org.uk, @unisonorg.uk, and Unite) have all successfully passed motions of no confidence in the Vice Chancellor and the entire executive board.

The #USA abstained from supporting lasting peace in #Ukraine. They couldn’t bring themselves to vote in favour of peace. Why?

Solidarity with my former colleagues @uonucu.bsky.social fighting to save what was once a great University @uniofnottingham.bsky.social

Photograph of people at a vigil in support of Ukraine in Cambridge, UK, holding placards and lighting candles, with a caption that reads: Rally for Ukraine on 4th anniversary of Russia's full-scale invasion. Great St Mary's Church, Cambridge. Tuesday 24th February, 6.30 PM

Four years ago today, we woke to find Russia had brought full-scale war back to Europe.

For four years the people of Ukraine have endured and resisted invasion and occupation, and held the line for freedom and democracy.

We must #StandWithUkraine until there is peace with justice.

(1/2)

And to send a clear message to the Ukrainian people and to the aggressor alike: we will not relent until peace is restored.

Peace on Ukraine’s terms.

Editorial: This war can last another 4 years – but it doesn’t have to The year is 2030. With spring around the corner, Ukraine has just endured the toughest winter of the war yet. It was Russia’s eighth winter campaign against the country’s energy infrastructure. Ukrai...

Four years of full-scale war later, Ukraine is fighting again for survival, and the most important lesson still remains to be learned. Russia does not respond to incentives. It responds to pressure.

Four years ago, Russia launched its full scale invasion of Ukraine along the entire shared border and from Belarus. Millions have been affected, with cities and villages destroyed and families torn apart. Eternal memory to all the heroes who gave their lives for the country’s freedom. #Ukraine

Sarkisov links from toric weighted blowups of P^4 at a point We study Sarkisov links initiated by the toric weighted blowup of a point in P^4 using variation of GIT. We completely classify which of these initiate Sarkisov links and describe the links explicitly. Moreover, if X is the toric weighted blowup of P^d at a point, we give a simple criterion in terms of the weights of the blowup that characterises when X is weak Fano.

For more details see Tiago Duarte Guerreiro's paper "Sarkisov links from toric weighted blowups of P^4 at a point", published in Portugaliae Mathematica.
ems.press/journals/pm/...

Tiago Duarte Guerreiro (Essex)8 December 2022"On toric Sarkisov Links from P^4"According to the Sarkisov Program, a birational map between a Fano variety of ... Tiago Duarte Guerreiro (Essex)

Tiago Duarte Guerreiro (Essex) speaking on "On toric Sarkisov Links from P^4" at our #AlgebraicGeometry #Math seminar back in December 2022. #MathSky

Cross-ratio degrees and perfect matchings Cross-ratio degrees count configurations of points z_1,...,z_n \in P^1 satisfying n-3 cross-ratio constraints, up to isomorphism. These numbers arise in multiple contexts in algebraic and tropical geometry, and may be viewed as combinatorial invariants of certain hypergraphs. We prove an upper bound on cross-ratio degrees in terms of the theory of perfect matchings on bipartite graphs. We also discuss several of the many perspectives on cross-ratio degrees—including a connection to Gromov-Witten theory—and give many example computations.

The research discussed by Rob Silversmith was published in the Proceedings of the American Mathematical Society.
www.ams.org/journals/pro...

Rob Silversmith (Warwick)28 November 2022"Cross-ratios and perfect matchings"Given a bipartite graph G (subject to a constraint), the "cross-ratio degree" of... Rob Silversmith (Warwick)

Rob Silversmith (Warwick) speaking on "Cross-ratios and perfect matchings" at our #AlgebraicGeometry #Math seminar back in November 2022. #MathSky

The 4-intersection unprojection format Unprojection theory is a philosophy due to Miles Reid, which becomes a useful tool in algebraic geometry for the construction and the study of new interesting geometric objects such as algebraic surfaces and 3-folds. In this present work we introduce a new format of unprojection, which we call the 4-intersection format. It is specified by a codimension 2 complete intersection ideal I which is contained in four codimension 3 complete intersection ideals J_1, J_2, J_3, J_4 and leads to the construction of codimension 6 Gorenstein rings. As an application, we construct three families of codimension 6 Fano 3-folds embedded in weighted projective space which correspond to the entries with identifier numbers 29376, 9176 and 24198 respectively in the Graded Ring Database.

The work discussed by Vasiliki Petrotou was published last year: "The 4-intersection unprojection format" in the Journal of Pure and Applied Algebra.
www.sciencedirect.com/science/arti...

Vasiliki Petrotou (Hebrew University of Jerusalem)17 November 2022"Tom & Jerry triples and the 4-intersection unprojection formats"Unprojection is a theory i... Vasiliki Petrotou (Hebrew University of Jerusalem)

Vasiliki Petrotou (Hebrew University of Jerusalem) speaking on "Tom & Jerry triples and the 4-intersection unprojection formats" at our #AlgebraicGeometry #Math seminar back in November 2022. #MathSky

Joey Palmer (Illinois)10 November 2022"Integrable systems with S^1-actions and the associated polygons"Semitoric systems are a type of four-dimensional integ... Joey Palmer (Illinois)

Joey Palmer (Illinois) speaking on "Integrable systems with S^1-actions and the associated polygons" at our #AlgebraicGeometry #Math seminar back in November 2022. #MathSky

Birational maps of Severi-Brauer surfaces, with applications to Cremona groups of higher rank We prove that any group of cardinality at most the one of $\mathbb{C}$ is a quotient of any Cremona group of rank at least $4$. This provides a definitive answer to the question of what the quotients…

For more details, see the arXiv preprint by Jérémy Blanc, Julia Schneider, and Egor Yasinsky.
arxiv.org/abs/2211.17123

Julia Schneider (EPFL)3 November 2022"Birational maps of Severi-Brauer surfaces, with applications to Cremona groups of higher rank"Cremona groups are groups... Julia Schneider (EPFL)

Julia Schneider (EPFL) speaking on "Birational maps of Severi-Brauer surfaces, with applications to Cremona groups of higher rank" at our #AlgebraicGeometry #Math seminar back in November 2022. #MathSky