A famous formula for π: π/4 = 1 − 1/3 + 1/5 − 1/7 + … This comes from a trigonometry formula: arctan(x) = x − x³/3 + x⁵/5 − x⁷/7 + … Putting x = 1 gives the series for π/4. This result was discovered independently by: Gottfried Wilhelm Leibniz (1673), James Gregory (1671), Nilakantha Somayaji (around 1500, in Tantrasangraha).

🚨 SlowMist TI Alert 🚨 The Shai-Hulud malware has resurfaced via the npm account atool(i@hust.cc), with over 600 malicious versions published. Notably, high-download packages such as size-sensor@1.1.4 (4.2M dl/mo), echarts-for-react@3.1.7 (3.8M dl/mo), and @antv/scale@0.6.2 (2.2M dl/mo) are at elevated risk. The attack carries risks: 1. AI agent hijacking: Claude Code, Codex, and VS Code tasks can trigger a Bun bootstrapper that re-executes the malicious payload. 2. Credential harvesting: The malware collects credentials from cloud services, GitHub, npm, local environments, and CI/CD pipelines. Using ^ to specify version ranges may cause npm to automatically install versions that have been compromised or contain security risks. Detection & Mitigation Measures: • Audit dependencies for any package published by atool (i@hust.cc) and check for suspicious preinstall scripts • Remove compromised packages and rotate all exposed credentials • Inspect CI/CD pipelines and local Node.js projects for malicious hooks or workflows • Revert to safe package versions or known-good dependencies ⚠️ Critical Action: Treat any system with affected packages as potentially compromised. Apply mitigation steps immediately.

3YE 5th Digital single 'LOCO' video call fan signing event 💛 📆 2023.12.09 SAT(KST) - 1:1 video call fan signing event: PM 6:00 - 1:3 video call fan signing event: PM 7:00 👉🏻 Retailer: #3YE# #LOCO# #EYE# * Detailed information will be uploaded at 3:00 PM

Infinite Geometric Series Visualization A geometric proof that 1/3 = ∑_{i=1}^∞ 1/4^i = 1/4 + 1/4² + 1/4³ + 1/4⁴ + 1/4⁵ + ⋯ The shaded triangles inside the large triangle represent the successive terms of the series; their areas sum to exactly one-third the area of the large triangle.

Grok Voice Think Fast 1.0 ranks #1# on the Artificial Analysis τ-Voice benchmark for real-world agentic customer service resolution Absolutely outperforming GPT-Realtime-2 (High) and Gemini 3.1 Flash by a huge margin That's a massive 12%+ lead over OpenAI's best model that just released a few days ago Grok is running real-time background reasoning without the latency penalty, which is why it is already handling live Starlink phone operations autonomously at scale

Exciting news - GPT-Image-2 by @OpenAI has claimed the #1# spot across all Image Arena leaderboards! A clean sweep with a record-breaking +242 point lead in Text-to-Image - the largest gap we’ve seen to date. - #1# Text-to-Image (1512), +242 over #2# (Nano-banana-2 with web-search aka gemini-3.1-flash-image) - #1# Single-Image Edit (1513), +125 over #2# (Nano-banana-pro aka gemini-3-pro-image) - #1# Multi-Image Edit (1464), +90 over #2# (Nano-banana-2) No model has dominated Image Arena with margins this wide. Huge congratulations to @OpenAI on this major breakthrough in image generation! More performance breakdowns by category in the thread below.

How it happened 👇 Jok: 23 PTS / 17 REB / 17 AST Mal: 21 PTS (3 3PM) / 6 AST / 1 BLK THJ: 18 PTS (4 3PM) / 3 REB AG: 16 PTS / 6 REB / 3 AST Cam: 14 PTS / 3 REB / 1 STL / 1 BLK CB: 13 PTS / 3 REB