Not just Fibbonacci series, Indians discovered: - Pythagorean theorem and geometric constructions (Baudhayana Sulba Sutras) - Binary patterns, binomial coefficients, Pascal’s triangle (Pingala’s Chhandas Shastra) - Positional decimal numeral system that we use today (Vedic period onward, formalized by Aryabhata) - Concept of zero as a number (Jain texts 300 BCE onward, rules formalized by Brahmagupta, 628 CE) - Negative numbers and their operations (Brahmagupta) - Sine and cosine tables, trigonometric identities, and π approximation (Aryabhata) - General solutions to quadratic equations and methods of solving them (Brahmagupta) - Infinite power series for π, sine, cosine, and arctangent (Madhava of Sangamagrama) - Precursors to Number theory, Calculus, Algebraic methods and many more