Common-pool resources, expanded in the discount factor
Notes on the common-pool model — the tragedy derived for N users, the patient planner expanded order by order in the discount factor, and a textbook fishery worked through at the end.
Blog
Game theory and economics, quantum physics, and what I learned building on the web — often with something you can play with.
Welche Dimension hat die Küste der Bretagne?
Eine Linie hat Dimension 1, eine Fläche 2 — und eine Küste? Mit einem Kästchen-Gitter lässt sich das nachmessen: Für die Bretagne kommt 1,19 heraus. Drei Widgets zum Selbermessen, für Mathe-Interessierte ab etwa Klasse 6.
Upgrading my AI agent to x402 - getting more open and private
I replaced my AI assistant's custodial smart contract with x402 payment channels — so I no longer hold anyone's money, nothing is published per message, and any client can find and pay the agent.
Can quantum physics generate institutions?
An example where the quantum prisoner's dilemma hands you a ready-made institution — and the question whether quantum could help generate institutions for harder problems.
Focused cybersecurity for a small project
Using a lightweight threat model to focus security work on a small project — figuring out what's actually worth protecting, and which alerts to safely ignore.
Building a Social Media Growth assistant for Under 50 Cents a Month
How I built a LangGraph-based social media assistant that generates, queues, and publishes posts to Mastodon and Bluesky — with human approval and a monthly cost of under 50 cents.
Ostdeutsche Spediteure stehen unter Kostendruck — aber wodurch eigentlich?
Ostdeutsche Spediteure erleben einen erheblichen Kostendruck unter anderem durch niedrigere Lohnkosten in osteuropäischen Nachbarländern. Interessanterweise, sind die Kostenunterschiede im Bereich von 10% und der eigentliche Kostendruck kommt aus einer anderen Richtung.
My take on a housing podcast: Rent vs. Buy Is Not One Decision
The podcast argument against buying a home is strongest for young mobile professionals, but much weaker once you distinguish between different households and the very different risks they face.
What Actually Protects Your Home?
A dinner conversation reveals why paying off your mortgage faster isn't always the safest strategy — and what actually protects your home when life goes wrong.
How to invest your money without predicting markets
A hands-on guide to ETF diversification using risk budgets, with interactive tools to find your own allocation.
Multi-Chain Architecture: Technical Notes
Technical summary of implementing multi-chain support for an NFT minting application. Notes on architecture, testing patterns, and lessons learned.
When political compromise becomes irrational
A simple model explains why budget negotiations might fail in democracies
First experiences with the x402 Standard for paying AI agents
I implemented the x402 payment standard for AI agents to autonomously pay for image generation services without accounts or sessions.
How bots exploited my ImageGen contract - and how I fixed it
A bot network exploited a vulnerability in my GenImNFT contract, extracting over 80 cents. Here's how they did it, how I fixed it, and what the forensic analysis revealed about the bot network that seemingly extracts substantial sums.
Democracy beyond the nation-state - What is there ?
When climate, water, and digital challenges cross borders but democracy doesn't, what's the alternative? This narrative essay compares confederation, federation, and cosmopolitan democracy through three fictional characters on a Barcelona-Tunis ferry.
Making My Site Discoverable - SEO, Webmentions, and a Traffic Spike
I overhauled my site's SEO with Schema.org markup and replaced Giscus comments with Webmentions. The timing coincided with a surprising 200% traffic increase. Here's what I learned about making content discoverable.
Quantum Smart Contracts II - What can we learn from NFTs for quantum computing with smart contracts ?
Can blockchain solve quantum computing's access problem? I tested the architecture with AI NFTs—here's what worked, what didn't, and what's still unsolved.
Quantum Smart Contracts I - Can we decentralize access to quantum computing with smart contracts ?
I explore how smart contracts can democratize access to quantum computing resources, enabling privacy-preserving decentralized payments and encrypted NFT results.
My AI Assistant That Takes ETH Instead of Subscriptions
I build an AI assistant that accepts Ethereum payments instead of subscriptions. Discover how Merkle batching enables efficient prepaid AI with instant responses.
Merkle Trees for LLM Batching - The fundamentals
I explore the fundamentals of Merkle trees for efficient LLM batching. Learn cryptographic proofs, batch verification, and AI service settlement optimization.
Tale of Four Islands: Solutions to the Tragedy of the Commons
I explore solutions to the Tragedy of the Commons through interactive island simulations. See how governance models affect resource sustainability and community outcomes.
The Prisoner's Dilemma
I explore the Prisoner's Dilemma through interactive game theory simulations. Discover strategic decision-making, Nash equilibrium, and how cooperation emerges in competition.
A public gallery of AI generated images
I create a privacy-focused AI image gallery where creators share work and collectors mint NFTs. Discover the technical details combining open-source generation with blockchain incentives.
A gallery of AI images
I build an NFT gallery for AI-generated images using ERC-721 Enumerable contracts. Learn how to upgrade smart contracts and create integrated user experiences for collectibles.
Updates to the website
I explore my website's evolution over 6 months, from minimal CSS to Panda CSS and Copilot refactoring. See how modern tools dramatically boost development productivity.
Generating AI images, paying anonymously and little
I implement anonymous micro-payments for AI image generation using Ethereum Layer-2. See how to connect blockchain payments with serverless AI for sustainable, privacy-focused services.
My short lived contact with the world of VCs in Germany
I explore the challenges of transitioning from quantum research to startup entrepreneurship. Valuable lessons about VC funding, deep tech development, and German startup realities.
A decentral support button
I build a decentralized support button using smart contracts for direct content monetization. Learn how blockchain enables transparent micro-payments without platform intermediaries.
Running an image generator
I build my own AI image generator using open-source models and European hosting. See how to integrate Stable Diffusion into static websites with full privacy and cost control.
Can I have interactive python pages ?
I explore the future of interactive content with Python running directly in browsers. Tools like Pyodide and JupyterLite enable portable, installation-free data science.
Is mirror.xyz a thing ?
I discover Mirror.xyz - a decentralized publishing platform combining Medium-like writing with Ethereum monetization. ENS domains and crypto wallets enable seamless creator support.
Are decentral websites a thing for me ?
I explore decentralized web hosting using ENS domains and IPFS storage. Discover how blockchain enables censorship-resistant websites without traditional hosting companies.
Moving old lectures
I migrate academic lectures from LaTeX to modern web formats. Discover solutions for handling equations, references, and static site generation in JavaScript environments.
Ideas behind the blog stack
I share my journey from scattered notes to a unified blog using React and Vike. Modern web tech offers speed, simplicity, and full version control over traditional solutions.
Hello World
I welcome you to my personal blog exploring technology, blockchain, and creative coding. Expect insights on modern web development, decentralized systems, and innovative digital experiences.