**Rod calculus** or rod calculation is the mechanical method of algorithmic computation with counting rods in China from the Warring States to Ming dynasty before the counting rods were replaced by the more convenient and faster abacus. Rod calculus played a key role in the development of Chinese mathematics to its height in Song and Yuan dynasty, culminating in the invention of polynomial equations of up to four unknowns in the work of Zhu Shijie.

Read more about Rod Calculus: Hardware, Software, Addition, Multiplication, Division, Fractions, System of Linear Equations, Extraction of Square Root, Extraction of Cubic Root, Polynomial Equation, Tian Yuan Shu, Polynomial Equations of Four Unknowns, See Also

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### Famous quotes containing the words calculus and/or rod:

“I try to make a rough music, a dance of the mind, a *calculus* of the emotions, a driving beat of praise out of the pain and mystery that surround me and become me. My poems are meant to make your mind get up and shout.”

—Judith Johnson Sherwin (b. 1936)

“The *rod* and reproof give wisdom: but a child left to himself bringeth his mother to shame.”

—Bible: Hebrew Proverbs 29:15.