Professor of Mathematics @OfficialUoM & @RoyalSociety Industry Fellow. I decompose matrices for a living.
Manchester, UK
Joined August 2013
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Stefan Güttel retweeted
We are playing the awesome @AfterAllFest this weekend!!!!
Friends old and new come and join the party @thepeerhat on Sat night (on stage at 9). Buzzin to share a stage with so many awesome acts.
Get your tickets here 👇 fatsoma.com/e/848wbm7y/la/r5…
See you down the front 🌠🎶🐝💫
'Fast and exact fixed-radius nearest neighbor search based on sorting' now available @PeerJCompSci peerj.com/articles/cs-1929
Mathematicians use AI to identify emerging COVID-19 variants manchester.ac.uk/discover/ne…
I gave an informal talk on the CLASSIX clustering algorithm in our @nla_grp seminar yesterday. It contains some MATLAB and Python live demos. youtube.com/watch?v=Q-CQBEYX…
Clustering more than 5.7 million data points in less than 8 seconds with CLASSIX (when HDBSCAN would take an hour) link.medium.com/4TewjS4V5Eb
Stefan Güttel retweeted
New work on combining sketching and Krylov subspace recycling with Liam Burke from @MathsTCD and Stefan Güttel @guettel. New algorithm GMRES_SDR and theoretical analysis of sketched GMRES, which we build upon to analyse our new method. arxiv.org/abs/2311.14206
Happy to announce the release of the CLASSIX #clustering toolbox for @MATLAB github.com/nla-group/classix…
CLASSIX a new clustering method that provides textual and visual explanations of its outputs.
It is also super fast. It clusters 2 million data points in under a second on a laptop where DBSCAN would require an hour. github.com/nla-group/classix…
New work on combining Krylov subspace recycling with randomized sketching for matrix functions and linear systems - arxiv.org/abs/2308.02290 (with Liam Burke @tcddublin)
ALT A plot that shows how Krylov subspace recycling helps to reduce the error when solving a sequence of 20 problems while updating an augmentation space from one problem to the next. The new recycling method is rFOM, and srFOM is its combination with sketching.
Stefan Güttel retweeted
#Manchester we are delighted to announce we will be returning to stage again @Gulliversmcr this Sept!
Buzzin to be sharing the stage with such fantastic lineup curated by @afterallmusico1
Grab your tickets fast fatso.ma/X5Vz
A sketch-and-select Arnoldi process. Using randomized sketching to compute a relatively well-conditioned basis of a Krylov space at low cost. Usually much better than truncated Arnoldi. arxiv.org/abs/2306.03592 (with Igor Simunec @scuolanormale)
ALT A MATLAB plot comparing the condition numbers of Krylov bases computed with eight different quasi-orthogonalization processes.
Stefan Güttel retweeted
🥳 We're number one in the UK, number one in Europe and second in the world for social and environmental impact in this year's @timeshighered University Impact Rankings.
#THEimpact
manchester.ac.uk/discover/ne…
Great news that our Knowledge Transfer Project with @Arup has been recognised in that way. Thanks to everyone involved!
We are delighted that our #KTP with @Arup has been recognised as being Outstanding! ✨🏆
A massive congratulations and well done to all involved!
🖱️To find out how #KTP could support innovation in your organisation, click here: bit.ly/UoM_BEKE
@OfficialUoM @UKRI_News
ALT We are delighted that our #KTP with @Arup has been recognised as being Outstanding! A massive congratulations and well done to all involved.
Stefan Güttel retweeted
Chris Hickey wins Bronze Medal at STEM for Britain nla-group.org/2023/03/29/chr…
Congratulations to Xinye Chen (@chenxinye2) who successfully defended his PhD thesis on "Fast aggregation-based algorithms for knowledge discovery" today. Many thanks to the examiners @TAH_Sci and @sdrelton and good luck for the next chapter Xinye! #proudsupervisor
ALT Dr Xinye Chen, who just passed his PhD viva, with supervisor in front of the University of Manchester's new Engineering Campus MECD
Great to have @jitseniesen from @mathsleedsuni visiting us @ManUniMaths with a very interesting talk on 'Plasma simulations using Vlasov equations and particle-in-cell methods'
Congrats to Chris Hickey @ArupUK for this achievement! Chris did a fantastic job making eigensolvers developed in our group (@nla_grp & @tisseurf) available to a global user base of @Oasys_Software. Funded by @innovateuk
Congrats to Chris Hickey 🥉 (@ArupUK), Arkady Way 🥇 (@OxfordStats) and Jenny Power 🥈(@jennypowerhour, @MathsatBath) on their medal wins at @STEM4Brit yesterday! A true celebration of excellent mathematical research. Well done to them and the 17 other finalists for 2023 👏
