abaci

Alas, abaci have already been commoditized --you can own your own franchise!

Dyscalculia: If I were king... doyle 2008

Studies have shown that kids who master abaci have a better comprehension of math.

Archive 2008-08-01 doyle 2008

Studies have shown that kids who master abaci have a better comprehension of math.

Dyscalculia: If I were king... doyle 2008

Alas, abaci have already been commoditized --you can own your own franchise!

Archive 2008-08-01 doyle 2008

Digital calculators notwithstanding, some abaci can still be found in a grade school classroom or two.

Crazy Twists On Ancient Technology Matt Woolsey 2006

An early example of a course-of-value recursion was given by Leonardo da Pisa, also called Fibonacci, in his Liber abaci, written in 1202 and revised in 1228, when discussing the famous rabbit problem (paria coniculorum):

Recursive Functions Odifreddi, Piergiorgio 2005

Also in the West, this kind of mathematics came fully to surface only after seven centuries or so, in the famous Liber abaci of Leonardo of Pisa (Fibonacci) around 1200 A.D.

Dictionary of the History of Ideas SALOMON BOCHNER 1968

The transepts are of the transitional style of the end of the twelfth century; the piers which carry the central tower are of the usual transitional type, having graceful capitals and square abaci supporting round arches; on each side of the north transept there are two original clerestory windows, and one of them has angle shafts, with carved caps and mouldings.

Scottish Cathedrals and Abbeys Herbert Story

These rest on triple shafts, with carved caps and rounded abaci.

Scottish Cathedrals and Abbeys Herbert Story

The arcade consists of low massive circular piers, with cushion capitals and plain chamfered abaci, which support semi-circular arches of one order also chamfered.

Bell's Cathedrals: The Cathedral Church of Durham A Description of Its Fabric and A Brief History of the Espiscopal See Joseph E. Bygate