BroadChain learned that at 19:06 on April 26, an amateur mathematician, with the help of ChatGPT, successfully solved a combinatorics problem proposed by Hungarian mathematician Erdős in the 1960s. This marks a shift in AI's role in mathematical research from "assisted verification" to "substantive breakthroughs." The Hacker News community debated this: Is it a victory of "human + AI," or a breakthrough purely driven by AI? Whether its mathematical proof meets rigorous standards remains controversial.
The U.S. Commodity Futures Trading Commission (CFTC) sued the New York State Department of Financial Services (NYDFS), accusing it of infringing on federal powers through its regulation of Coinbase and Gemini. This is the first direct confrontation between U.S. federal and state regulators in the crypto space, potentially reshaping the U.S. crypto regulatory landscape.
After the KelpDAO vulnerability caused rsETH to depeg, protocols including Aave, EtherFi, Ethena, and Lido jointly established a recovery fund, with KelpDAO contributing 2,000 ETH. A final solution has been reached, pending DAO voting and technical implementation, affecting over 71,700 users. The community debated whether this is "DeFi mutual aid spirit" or large protocols preventing systemic risk.
The U.S. Treasury Department's Office of Foreign Assets Control (OFAC) blacklisted two crypto wallets directly linked to the Central Bank of Iran; Tether cooperated by freezing $344 million. This is the largest single enforcement action by a stablecoin issuer under the sanctions framework, once again exposing the "on-off switch" risk of centralized stablecoins.
Brazilian regulators banned prediction market platforms such as Kalshi and Polymarket, citing "protecting investors from unlicensed gambling risks." Following China and India, Brazil has become another emerging market to reject decentralized prediction markets.
The Litecoin network experienced its first major privacy layer vulnerability, leading to a double-spend attack. Miners coordinated a chain reorganization, rolling back three hours of transaction history. This incident highlights the collision between the promise of "immutability" and real-world security constraints. Tether froze $344 million through a single backend operation, while Litecoin required global miner coordination to roll back three hours—sometimes, "decentralization" can be more fragile.