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'Periodic table' for AI methods aims to drive innovation

Artificial intelligence is increasingly used to integrate and analyze multiple types of data formats, such as text, images, ...

Understanding Fiscal Multipliers: Definition, Formula, and Real-World Impact

Learn how the fiscal multiplier impacts GDP, understand its formula, and see real-world examples of fiscal policies affecting ...

Understanding Marginal Propensity to Import (MPM) and Its Impact

Explore marginal propensity to import (MPM) and learn how changes in disposable income affect import levels. Discover its ...
Nature

The Cross X as a Symbol for Multiplication

HISTORIANS of mathematics attribute the first use of the cross x as a symbol for multiplication to William Oughtred (“Clavis Mathematicae”, London, 1631). See W. W. R. Ball's “Short Account of the ...