Solar-powered calculators may have familiarized a new generation with green energy. On the other hand, maybe they were just cool.

Can you chip in? This year we’ve reached an extraordinary milestone: 1 trillion web pages preserved on the Wayback Machine. This makes us the largest public repository of internet history ever ...

The Babylonians were the first people to systematically apply myths to constellations and astrology and describe the twelve signs of the zodiac. The Egyptians followed shortly after by refining the ...

Check the best 5-month study plan to score 95% and above. Get a month-wise schedule, stream-wise tips for Science, Commerce, ...

Abstract: Intuitionistic fuzzy set (IFS) can depict an object simultaneously from both the superiority and inferiority aspects, and its basic element is an intuitionistic fuzzy number (IFN). Based on ...

Trigonometric Functions and Complex Numbers covers the followings areas in the International Mathematical Olympiad (IMO) and other mathematical competitions. Trigonometric identity, graphs and ...

Ask the publishers to restore access to 500,000+ books. Can You Chip In? We’re celebrating our 1 trillionth archived web page. If you find our library useful, learn how you can help us fundraise! Can ...

Mathematics is the fundamental knowledge for every scientist. As an academic at the University of Science and Technology of China, Professor Sheng Gong takes his passion for mathematics teaching even ...