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K. P. Hart

@hartkp.eurosky.social
144 followers 124 following 871 posts

Eg e' matematiker/I'm a mathematician Also: mathsplainer And: mathstodon.xyz/@hartkp

PostsRepliesMedia
Reposted by K. P. Hart
The Onion @theonion.com · 05/10/2026
Toddler Scientists Finally Determine Number Of Peas That Fit Into Ear Canal theonion.com/toddler-scientists-fin…
Toddler Scientists Finally Determine Number Of Peas That Fit Into Ear Canal
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Reposted by K. P. Hart
fesshole 🧻 @fesshole.bsky.social · 24/09/2026
I'd met a man in a gay club and gone back to his place for some together time. It went well, then his sister brought us tea and toast in bed the next morning. And that's how I met my wife. She still makes an excellent cup of tea.
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Reposted by K. P. Hart
Chris Aalberts @chrisaalberts.bsky.social · 24/09/2026
'Ik word er zelf altijd heel blij van als ik mijn werk kan koppelen aan datgene wat aan het brein van onze universiteitsbestuurders is ontsproten' www.erasmusmagazine.nl/2026/09/24/d...
erasmusmagazine.nl
De collegevoorzitter hoopt dat wetenschappers energie krijgen van gebakken lucht
“Gehussel met organisatieonderdelen en een hoop managementspeak.” Chris Aalberts krijgt weinig energie van het plan om faculteiten te clusteren tot ‘academic powerhouses’.
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K. P. Hart @hartkp.eurosky.social · 19/09/2026
Mooie afstudeertoespraak in Gent: www.ugent.be/lw/nl/actuee...
ugent.be
"Wij zijn afgestudeerd. Maar ons werk begint nu pas."
Zo sloot Maria Nkanu Nkanu, kersverse master in gender en diversiteit, haar speech op de plechtige proclamatie van 16 september af.
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Reposted by K. P. Hart
Nicolas Hénin @nicolashenin.net · 17/09/2026
Nice campaign by the Norwegian Consumer Council about the declining lifespan of products. Enjoy!
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Reposted by K. P. Hart
Randall Munroe @xkcd.com · 08/09/2026
Handedness xkcd.com/3293/
Comic. [Two people considering diagrams on whiteboard] PERSON 1 with ponytail: The W bosons produced by the collider beam will mostly be left-handed. PERSON 2: So we should send in a *right*-handed batter.
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K. P. Hart @hartkp.eurosky.social · 05/09/2026
Ferdiglest
Jo Nesbø: Nådeskud
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K. P. Hart @hartkp.eurosky.social · 30/08/2026
I just imported my reading list to BookHive! 📚 bookhive.social
bookhive.social
Bookhive
Goodreads but better. Built on top of Blue Sky.
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K. P. Hart @hartkp.eurosky.social · 30/08/2026
Finished
Emily Kimelman - Insatiable
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K. P. Hart @hartkp.eurosky.social · 23/08/2026
@waywordradio.org @marthabarnette.bsky.social Just heard about the word hooplah for a dip in the road. There is also ha-ha for a dip, not necessarily in a road.
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K. P. Hart @hartkp.eurosky.social · 18/08/2026
@enithka.bsky.social Hoi Enith. Gefeliciteerd met je verjaardag.
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K. P. Hart @hartkp.eurosky.social · 14/08/2026
Finished
Emily Kimelman: Unleashed
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K. P. Hart @hartkp.eurosky.social · 12/08/2026
Iedereen naar de Nazomercursus 2026. Het gaat over de beginselen van de Numerieke Wiskunde. Ook een mooie gelegenheid voor een uitje naar Antwerpen. platformwiskunde.nl/onderwijs/na...
platformwiskunde.nl
Nazomercursus – Platform Wiskunde Nederland
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Reposted by K. P. Hart
Randall Munroe @xkcd.com · 11/08/2026
Trick Play xkcd.com/3282/
Comic. [diagram of a football field with people on each team represented as O or X. Arrows and dotted lines between players indicate passing or dribbling, but at one point a player simultaneously passes to two different players who both shoot at the goal; the goalie can only defend against one.] [caption] The math department team’s opponents hate it when Banach passes to Tarski.
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K. P. Hart @hartkp.eurosky.social · 10/08/2026
@audreykearns.bsky.social Happy Birthday here too
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K. P. Hart @hartkp.eurosky.social · 01/08/2026
De @volkskrant.nl over ultrafinitisten en het oneindige (ik doe ook mee): www.volkskrant.nl/wetenschap/d...
volkskrant.nl
Dwarse wiskundigen willen af van oneindigheid, sleutelbegrip in hun vakgebied: ‘Totale onzin’
Aan alles komt een einde, heet het. Maar in de wiskunde is oneindig een van de belangrijkste begrippen. Tot ergernis van een groepje rebellen, die betwijfelen of het bestaat en ervan af willen. ‘Het o...
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K. P. Hart @hartkp.eurosky.social · 27/07/2026
#159
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K. P. Hart @hartkp.eurosky.social · 27/07/2026
@marthabarnette.bsky.social @waywordradio.org About "messages" (heard yesterday): the same goes in Dutch: "boodschappen" has both meanings as well: "elke zaterdagochtend doe ik de boodschappen" and "ik heb een boodschap voor je van ..."
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K. P. Hart @hartkp.eurosky.social · 21/07/2026
Ferdiglest
Ellen Viste
Temperatur 
En historie om kuldesjokk, varmedød og arten som stiller klodens termostat
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K. P. Hart @hartkp.eurosky.social · 28/06/2026
Ferdiglest
Tom Egeland 
Satans Segl
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Reposted by K. P. Hart
Lowdown Cryptic @lowdowncryptic.bsky.social · 27/06/2026
My fellow Canadians: we're excited for tomorrow's #WorldCup match, but here's another exciting event... Starting on July 5, it's the #Canada #Cryptic #Crossword Championship! 🇨🇦 🤩 (there's also a US one) Register for free at www.crypticsingh.com (photo is optional) Please share! #USCanadaCrypticCC
Poster for Canada Cryptic Crossword Championship 2026
Organized by Extra-C on CrypticSingh.com
For Canada residents of any nationality

Every Sunday of July at 10am Pacific, 1pm Eastern
July 5 - Practice Round
July 12 - Online Round 1
July 19 - Online Round 2
July 26 - Final Leaderboard

Free registration on CrypticSingh.com

Prizes:
Winner $500
Runner-Up $300
2nd Runner-Up $200
Medals for Podium Finishers
Certificates for all Prov/Terr Winners
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Reposted by K. P. Hart
Brian Bilston @brianbilston.bsky.social · 26/06/2026
SHAKESPEAREAN HAIKU Shall I compare thee To a summer’s day? Alright – Thou art very hot.
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K. P. Hart @hartkp.eurosky.social · 26/06/2026
A quite important bridge in Delft will not close anymore: district8.net/brug-op-druk...
district8.net
Brug op drukke verbindingsweg tussen A4 en A13 dicht na storing door hitte N470 Delft
Delft – De Kruithuisbrug, onderdeel van de N470, in Delft sluit niet meer door de warmte. Het beweegbare gedeelte van de brug voor voetgangers en fietsers is door de warmte uitgezet. Daardoor kon de b...
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K. P. Hart @hartkp.eurosky.social · 26/06/2026
Normal spaces, T_4-spaces? What's the difference? Depends on whom you read. mathoverflow.net/questions/51...
mathoverflow.net
Reason for distinguishing between normal spaces and $T_4$-spaces
I'm in the process of writing a book on point-set topology (as a prologue to a book on algebraic topology). I have a question that is partly terminological and partly mathematical. When discussing...
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K. P. Hart @hartkp.eurosky.social · 22/06/2026
Mijn score: demo.sgma.memorylab.app#/sgma-result...
demo.sgma.memorylab.app
MemoryLab
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K. P. Hart @hartkp.eurosky.social · 20/06/2026
@tomegeland.bsky.social Boken er fram, nå er det bare å sitte og lese
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K. P. Hart @hartkp.eurosky.social · 19/06/2026
Eindexamen wiskunde B vwo, de tweede zitting; uitwerkingen en opmerkingen: fa.ewi.tudelft.nl/~hart/onderw...
fa.ewi.tudelft.nl
Eindexamens Wiskunde
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K. P. Hart @hartkp.eurosky.social · 14/06/2026
It is world-hug-a-blood-donor-day again, go ahead and hug one (me for example) and sign up as a donor. www.who.int/campaigns/wo...
who.int
World Blood Donor Day 2026
On World Blood Donor Day, celebrated on 14 June 2026, WHO, its partners and communities across the world will unite behind the theme: One Drop of Humanity. Give Blood. Save Lives.
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Reposted by K. P. Hart
The Onion @theonion.com · 13/06/2026
Commentary: I Work Very Hard, And I Would Like To Try Cake
theonion.com
I Work Very Hard, And I Would Like To Try Cake
Hello. I am a horse. I work very hard at my job of being a horse. When humans say move the heavy thing, I move the heavy thing. When humans sit on top of me and pull on my head, I carry them where the...
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Reposted by K. P. Hart
fesshole 🧻 @fesshole.bsky.social · 12/06/2026
Office has a censor filter in internal comms to replace swear words with other terms. Added a rule changing "AI" to "my cat", so we get "According to my cat..." and "I asked my cat and it said..."
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K. P. Hart @hartkp.eurosky.social · 12/06/2026
The real world cup starts today: en.wikipedia.org/wiki/2026_Wo...
en.wikipedia.org
2026 Women's T20 World Cup - Wikipedia
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Reposted by K. P. Hart
depths of wikipedia @depthsofwikipedia.bsky.social · 11/06/2026
en.wikipedia.org/wiki/List_of...
en.wikipedia.org
List of the longest English words with one syllable - Wikipedia
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Reposted by K. P. Hart
Unch Crosswords @unchcrosswords.com · 09/06/2026
Keep it quiet but UNCH ISSUE FOUR PRE-SALES ARE OPEN NOW unchcrosswords.com#shop
unchcrosswords.com
Unch Crossword Magazine
Unch, the clued-up crossword magazine
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K. P. Hart @hartkp.eurosky.social · 27/05/2026
Finished
Kim Sherwood - Hurricane Room
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K. P. Hart @hartkp.eurosky.social · 21/05/2026
@nadineboke.bsky.social Hoi Nadine, Facebook zegt het, dus het is waar: gefeliciteerd met je verjaardag
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Reposted by K. P. Hart
depths of wikipedia @depthsofwikipedia.bsky.social · 19/05/2026
Tunemah Peak is a mountain in Fresno County, California, located in the southwestern United States, with an elevation of 11,158 feet. The mountain gets its name from the nearby Tunemah Trail, which originated in 1878 when a Cantonese cook and a shepherd uttered the Cantonese curse "屌你阿媽" (Jyutping: diu2 nei5 aa3 maa1; lit. 'fuck your mother') while walking along the rugged trail.[1][2][3]
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Reposted by K. P. Hart
John McIntyre @johnemcintyre.bsky.social · 18/05/2026
You got something against Emily Wilson?
johnemcintyre.blogspot.com
Greek to them
If you have not been on Twitter lately, and I know that many of you have left it in disgust, you will not have seen that the silly season i...
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K. P. Hart @hartkp.eurosky.social · 14/05/2026
Het eindexamen wiskunde B (vwo) was gisteren. Hier zijn mijn uitwerkingen te vinden: fa.ewi.tudelft.nl/~hart/onderw...
fa.ewi.tudelft.nl
Eindexamens Wiskunde
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K. P. Hart @hartkp.eurosky.social · 12/05/2026
Uit
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Reposted by K. P. Hart
Marc van Oostendorp @fonolog.bsky.social · 11/05/2026
Zolang Neerlandistiek offline is (en ik begrijp dat dit nog wel een paar dagen kan duren) beginnen we: Neerlandistiek op zolder! www.vanoostendorp.nl/neerlandisti... Vanavond in ieder geval een verslag van de uitreiking van de Libris Prijs! Uw hoofdredacteur in ruste is er bij.
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K. P. Hart @hartkp.eurosky.social · 09/05/2026
Bekijk dit! - campagnes.degoedezaak.org/campaigns/wa...
campagnes.degoedezaak.org
Wat doet dit Kabinet met jouw gegevens?
Wat doet het Kabinet met jouw gegevens?
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Reposted by K. P. Hart
Taaldokter @taaldokter.bsky.social · 05/05/2026
Op @NPORadio1 heeft de voorzitter van het Landelijk Aktie Komitee Scholieren het er in het kader van 'holocaust-educatie' over dat een 'doorlopende leerlijn' beter werkt dan dingen 'uit je hoofd stampen'. #injehoofdleren
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K. P. Hart @hartkp.eurosky.social · 29/04/2026
Finished
Shelby J. Killer - Point-set Topology
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K. P. Hart @hartkp.eurosky.social · 29/04/2026
Ferdiglest
Knut Nærum - Krig!
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K. P. Hart @hartkp.eurosky.social · 22/04/2026
Ferdiglest
Knut Nærum og Karstein Ville - Svanger
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K. P. Hart @hartkp.eurosky.social · 21/04/2026
Ferdiglest
Knut Nærum og Karstein Ville
Likbilen
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K. P. Hart @hartkp.eurosky.social · 18/04/2026
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K. P. Hart @hartkp.eurosky.social · 18/04/2026
Ferdiglest
Aksel Sandemose - Det Svunde er en Drøm
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K. P. Hart @hartkp.eurosky.social · 14/04/2026
@petersagal.bsky.social Something for you: Cheese-stroopwafel. Cheesy wafel with the stroop in between. www.ah.nl/producten/pr...
ah.nl
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K. P. Hart @hartkp.eurosky.social · 10/04/2026
#158
My right arm, donating blood
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