number theory

American

noun

Mathematics.

the study of integers and their relation to one another.

number theory British

noun

the study of integers, their properties, and the relationship between integers

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of number theory

First recorded in 1910–15

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The five-year weekly chart shows the stock has returned to a breakout above a bullish inverse head and shoulders pattern at the very round $100 level from May 2023, a textbook example of round number theory in action.

From Barron's

Tuesday’s session produced a bullish engulfing candle that reversed higher precisely at the very round $400 level, an example of round number theory coming into play.

From Barron's

Round number theory may come into play near $300.

From Barron's

It is now back above its 21-day exponential moving average and notice how round number theory plays a pivotal role with a bearish shooting star candle at $800 on Aug. 15 and a bullish island reversal at $500 in April started its long ascent.

From Barron's

Round number theory came into play with a bearish engulfing candle at $20 on June 23, which preceded a 71% decline until a doji on Dec. 16 signaled the potential turnaround.

From Barron's

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023