Applied mathematician at Ghent University Global Campus in Incheon, South Korea. Former scientific software developer, Python coder.https://bsky.app/profile/jvkersch.bsky.socialhttps://bsky.app/profile/jvkersch.bsky.social/post/3msys6qkqrc26Glad to be able to provide light entertainment for gpt 5.613 Aug 2026 23:26 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3msys6qkqrc26https://bsky.app/profile/jvkersch.bsky.social/post/3lv32gi5f522oExperiment 2 with #claudecode: vibe-coded #manim animations to convey the intuition behind QQ plots, which are notoriously difficult to explain just on the whiteboard. youtu.be/7jH5tloKHYQ https://youtu.be/7jH5tloKHYQ29 Jul 2025 02:23 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3lv32gi5f522ohttps://bsky.app/profile/jvkersch.bsky.social/post/3luzq4gxpyc2sInspiring deepdive by @sachachua.com -- always inspiring and thought-provoking https://sachachua.com/blog/2025/07/my-emacs-writing-experience/28 Jul 2025 13:46 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3luzq4gxpyc2shttps://bsky.app/profile/jvkersch.bsky.social/post/3lulmx337yk25First impressions with Claude Code: Add section headers to my calculus slide decks, and have autogenerated ToCs (https://github.com/ugent-korea/IEM-slides/issues/62). Overall: productive experience, but weird -- the jagged edge is real. 🧵👇22 Jul 2025 23:12 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3lulmx337yk25https://bsky.app/profile/jvkersch.bsky.social/post/3luk7w5uyks2nDropping one "Make it so, Mr Crusher" has made Claude Code switch completely into Star Fleet officer mode...22 Jul 2025 09:46 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3luk7w5uyks2nhttps://bsky.app/profile/jvkersch.bsky.social/post/3loixdlcbp22sThe figure quoted in the article is 3Wh per query, which checks out: running one query with the DeepSeek 70b model quantized to 4 bits keeps my GPU busy for about 30 seconds, which works out to 1-1.5 Wh. [contains quote post or other embedded content]06 May 2025 13:09 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3loixdlcbp22shttps://bsky.app/profile/jvkersch.bsky.social/post/3lncrfa6iyk2nPlus or minus sexy? [contains quote post or other embedded content]21 Apr 2025 08:41 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3lncrfa6iyk2nhttps://bsky.app/profile/jvkersch.bsky.social/post/3lm6lvmuw5k2yCasually leafing through Leibniz's papers, as one does, and was surprised to see these astronomical symbols ☽☉ used as shorthand. Looking forward to using these, as well as ☿♃♆ etc in my calculus class.06 Apr 2025 23:27 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3lm6lvmuw5k2yhttps://bsky.app/profile/jvkersch.bsky.social/post/3llpadmm6a22hThis reminds me of my own journey to Python way back when (about 20 years ago). I was in a B&B without internet access and couldn't access the Matlab license server, and just decided to ditch it altogether. [contains quote post or other embedded content]31 Mar 2025 20:50 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3llpadmm6a22hhttps://bsky.app/profile/jvkersch.bsky.social/post/3llhacx34ek2lStarted reading Paul Nahin's "An Imaginary Tale: The Story of √-1" in preparation for teaching about complex numbers. Somehow I had never seen the derivation of the formula for the roots of a cubic, and was surprised at how easy it was to follow -- and how magical it must have been to derive.28 Mar 2025 16:29 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3llhacx34ek2lhttps://bsky.app/profile/jvkersch.bsky.social/post/3lchqu666gs2tRecently I got a citation alert for a paper that extended a result of mine from 2010. Upon closer inspection it turns out that the authors are from North Korea. Crazy that we are a mere 250 kilometers apart but we may be as well on a different planet.04 Dec 2024 08:38 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3lchqu666gs2thttps://bsky.app/profile/jvkersch.bsky.social/post/3lc37rpds2k24Today I had to simulate a bioinformatics pipeline running in limited resources. Some useful commands, available on any modern Linux system 👇29 Nov 2024 09:00 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3lc37rpds2k24https://bsky.app/profile/jvkersch.bsky.social/post/3kiccbfs7rk2aNew rule to survive the dark Belgian winters: hours before sunrise and after sunset are dedicated to learning.06 Jan 2024 07:38 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3kiccbfs7rk2ahttps://bsky.app/profile/jvkersch.bsky.social/post/3kf5cjwkbtx2wContinuing from where I left off on Twitter... twitter.com/jvkersch27 Nov 2023 03:44 +0000at://did:plc:bixrj5kps7eomk7gomutqaot/app.bsky.feed.post/3kf5cjwkbtx2w