David Meyer @dajmeyer.bsky.social · 06/10/2026Second lecture on Kelvin waves in my Intro to Mathematical Modeling class @ucsdphysci.bsky.social @ucsandiego.bsky.social. Explained the “passive deep water approximation” and the Coriolis effect terms in the pressure acceleration equations. 120
David Meyer @dajmeyer.bsky.social · 03/10/2026Explained “Being irrational” to the older kids in the San Diego Math Circle this morning: √2, e, and π. Latter required instant calculus: derivatives of polynomials and sin & cos, integral as area, and Fundamental Theorem of Calculus. A 2.5 hour marathon! 010
David Meyer @dajmeyer.bsky.social · 30/09/2026Began lecturing on Kelvin waves in my Intro to Math Modeling class @ucsdphysci.bsky.social @ucsandiego.bsky.social today. 020
David Meyer @dajmeyer.bsky.social · 19/09/2026I just read this paragraph in @philippullmanreal.bsky.social’s _The Secret Commonwealth_ and realized that captchas are a kind of catechism. 000
David Meyer @dajmeyer.bsky.social · 16/09/2026Heading home after a fortnight+ in England. It’s still sunny; I haven’t worn my rain jacket once! 000
David Meyer @dajmeyer.bsky.social · 16/09/2026Catherine Lovegrove mural, “Platform One” of Paddington Station. 000
David Meyer @dajmeyer.bsky.social · 16/09/2026World Wars memorial for Great Western Railway workers, in Paddington Station. 000
David Meyer @dajmeyer.bsky.social · 16/09/2026Isambard Kingdom Brunel, first engineer of the Great Western Railway, and designer of Paddington Station. 000
David Meyer @dajmeyer.bsky.social · 16/09/2026Nick Drake poem “Message from the unseen world” installed under Bishop’s Bridge Road in Paddington Central, for Alan Turing, born near here in 1912. 010
David Meyer @dajmeyer.bsky.social · 15/09/2026Marmite & toasties at StarbucksUK (which is not Starbucks since my app doesn’t work). 000
David Meyer @dajmeyer.bsky.social · 15/09/2026This book, edited by Grybauskas, includes Tolkien’s alliterative poetic drama, _The Homecoming of Beorhtnoth_, the leader of the defeated Anglo-Saxon defenders. There is a statue of him, at age 68 (so I should have a few more good years!), at the end of the #Maldon Promenade. 041
David Meyer @dajmeyer.bsky.social · 15/09/2026#Maldon is perhaps best known for Maldon Salt Co., but long before that company was formed, it was the site of the defeat of the Anglo-Saxons by the Vikings in August 991, described in _The Battle of Maldon_. I found this translation by Tolkien in a bookstore there on High Street. 000
David Meyer @dajmeyer.bsky.social · 14/09/2026Ebbing tide in the River Chelmer estuary, from the #Maldon Promenade: 000
David Meyer @dajmeyer.bsky.social · 14/09/2026Visited Maldon in Essex today. This is the 15th century Moot Hall, where the town council met for centuries. Having tea at Mrs. Salisbury’s we ran into Sue from this video: youtu.be/X3TnTVaBPbU?... 011
David Meyer @dajmeyer.bsky.social · 14/09/2026My PhD advisor and dear friend, Rafael Sorkin, passed away Saturday night. I was thinking of him Sunday afternoon in the @jesuscollegecam.bsky.social Chapel while the organist was practicing. Rafael was not particularly religious, but he would have appreciated the music. 010
David Meyer @dajmeyer.bsky.social · 14/09/2026The Corpus Christi Chronophage Clock, designed by alumnus and horologist John C. Taylor www.corpus.cam.ac.uk/articles/sec... 110
David Meyer @dajmeyer.bsky.social · 14/09/2026Plaque memorializing Edward FitzGerald’s lodgings on King’s Parade when he was a student at Trinity College Cambridge 1826-30. His “translation”, _The Rubáiyát of Omar Khayyam_, was published in several different versions, in 1859, 1868, 1872, and 1879 (and posthumously, 1889). 010
David Meyer @dajmeyer.bsky.social · 14/09/2026Samuel Taylor Coleridge in the Chapel @jesuscollegecam.bsky.social where he studied w/o graduating, and wrote, “A mathematical problem” archive.org/details/cu31... ⋮ In which the circles make a pother Cutting and slashing one another, Bid the straight lines a journeying go. ⋮ 000
David Meyer @dajmeyer.bsky.social · 14/09/2026Some of the sculptures @jesuscollegecam.bsky.social Barry Flanagan, _Bronze Horse_ Keir Smith, _Coastal Path_ Geoffrey Clarke, _Call it Hadrian’s Wall_ Danny Lane, _Empress_ 010
David Meyer @dajmeyer.bsky.social · 13/09/2026And here’s John Constable’s painting of the _Flatford Mill_ with the same view today, mostly blocked by trees. 010
David Meyer @dajmeyer.bsky.social · 13/09/2026Here is John Constable’s _Boat-Building Near Flatford Mill_ and what the dry dock looks like now. 110
David Meyer @dajmeyer.bsky.social · 13/09/2026We started our very English day by visiting Flatford, where John Constable painted his most famous landscape, _The Hay Wain_. There is a lot of duckweed because the summer has been so hot. The model of the hay wain is at #Colchester Castle @colmuseums.bsky.social. 151
David Meyer @dajmeyer.bsky.social · 12/09/2026Memorial to the victims of the Essex Witch Hunts, imprisoned in the dungeons of #Colchester Castle in the 16th & 17th centuries. 051
David Meyer @dajmeyer.bsky.social · 12/09/2026Finishing off the most British of days w/the last night at the Proms (just on TV): 000
David Meyer @dajmeyer.bsky.social · 12/09/2026My favorite part of the @ColMuseums at #Colchester Castle: a chainmail hauberk. It is very heavy! 054
David Meyer @dajmeyer.bsky.social · 12/09/2026The #Colchester Vase at the Colchester Castle @colmuseums.bsky.social 030
David Meyer @dajmeyer.bsky.social · 12/09/2026Here’s the Sheepen Cauldron, on display at #Colchester Castle @colmuseums.bsky.social the oldest known bronze cauldron. It reminded me, of course, of Lloyd Alexander, _The Black Cauldron_. 062
David Meyer @dajmeyer.bsky.social · 12/09/2026Visited #Colchester Castle @colmuseums.bsky.social. Tombstone is of Longinus, born in what is now Bulgaria, duplicarius in the Roman army. 0188
David Meyer @dajmeyer.bsky.social · 12/09/2026We even got to watch England international John Terry’s nephew, Frankie, play center back for @colu-official.bsky.social the last few minutes of the game. 000
David Meyer @dajmeyer.bsky.social · 12/09/2026@colu-official.bsky.social takes their groundskeeping seriously. 000
David Meyer @dajmeyer.bsky.social · 12/09/2026To get the full English experience* we joined the Blue White Army to watch @colu-official.bsky.social vs @crewealexandra.bsky.social. The U’s were leading 1-0 until a tying goal in the 94th minute! *Possibly the beautiful weather prevented an authentic English experience! 100
David Meyer @dajmeyer.bsky.social · 12/09/2026The Dutch Quarter in #Colchester has centuries of different architectures: here are a 17th century cottage, two 16th century timber-framed buildings, and the former Nelson’s Head pub rebuilt in 1891. 000
David Meyer @dajmeyer.bsky.social · 11/09/2026The recent shift in #Colchester politics (away from @conservatives.bsky.social, not towards Reform UK (~MAGA) like rest of Essex, but @labouruk.bsky.social) is anticipated by street names memorializing heroes of the Peasants’ Revolt: Wat Tyler & John Ball. 100
David Meyer @dajmeyer.bsky.social · 11/09/2026Zooming in from England to hear Javier Gómez-Serrano speak about "New Math + #AI Developments in Fluid Mechanics" cmsa.fas.harvard.edu/event/navier... "Please rewrite the paper!" 000
David Meyer @dajmeyer.bsky.social · 11/09/2026Home of Jane and Ann Taylor, authors of “Twinkle, twinkle, little star” (1806) in #Colchester, England. 000
David Meyer @dajmeyer.bsky.social · 10/09/2026I’m told that early holly berries presage a harsh winter here in England. 000
David Meyer @dajmeyer.bsky.social · 10/09/2026Flor Kent statue _Für das Kind / For the Child / Pro Dítě_ at Liverpool Street Station. 000
David Meyer @dajmeyer.bsky.social · 10/09/2026I unearthed 😄 the reason for the statue of Captain Matthew Flinders at Euston Station: www.theguardian.com/science/2019... 000
David Meyer @dajmeyer.bsky.social · 10/09/2026Lancashire cheese & onion pie with mushy peas for dinner at Great North Pie Co. in #Manchester: 000
David Meyer @dajmeyer.bsky.social · 10/09/2026Plan for a Sumerian Temple: temple: “The tablet includes numerical labels using the Sumerian #qubit to calculate brick quantities.” in @thejohnrylands.bsky.social library @uomlibrary.bsky.social 010
David Meyer @dajmeyer.bsky.social · 10/09/2026Nouvelle Édition (1799-1802) de l’Histoire des Mathématiques par Jean-Étienne Montucla, à la bibliotèque @thejohnrylands.bsky.social @uomlibrary.bsky.social 000
David Meyer @dajmeyer.bsky.social · 10/09/2026The 1760-1762 “Jesuit Edition” of Isaac Newton's _Philosophiae Naturalis Principia Mathematica_, just on a shelf in @thejohnrylands.bsky.social Library @uomlibrary.bsky.social, unremarked! 020
David Meyer @dajmeyer.bsky.social · 10/09/2026Interior of @thejohnrylands.bsky.social Library @uomlibrary.bsky.social: 000
David Meyer @dajmeyer.bsky.social · 10/09/2026@thejohnrylands.bsky.social Library @uomlibrary.bsky.social, font designed by letter carver David Kindersley, pre-Harry Potter. 000
David Meyer @dajmeyer.bsky.social · 10/09/2026Lincoln Square in #Manchester, England. “I know and deeply deplore the suffering which the working people of Manchester and in all Europe are called to endure in this crisis.” 000
