1 − 2 + 3 − 4 + ⋯1 − 2 + 3 − 4 + ⋯
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What Wikipedia says
In mathematics, 1 − 2 + 3 − 4 + ··· is an infinite series whose terms are the successive positive integers, given alternating signs. Using sigma summation notation the sum of the first m terms of the series can be expressed as
Excerpt from the Wikipedia article “1 − 2 + 3 − 4 + ⋯”, under the CC BY-SA 4.0 license. Read the article on Wikipedia
Image: user:Melchoir, CC BY-SA 3.0, via Wikimedia Commons.
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