2026-09-20T16:44:53Z https://njump.me Nostr notes by Peter Ludemann Peter Ludemann https://njump.me/npub107nyde0pnstwsjq2fu4ps9dq8j0ffyaf8qtcla65meqff352f76s3yqqc4 https://media.mathstodon.xyz/accounts/avatars/109/269/718/290/306/906/original/0954b188890d6686.jpg https://media.mathstodon.xyz/accounts/avatars/109/269/718/290/306/906/original/0954b188890d6686.jpg