∆
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Translingual
Etymology
From the Ancient Greek capital letter Δ.
Symbol
∆
- (mathematics) An increment or change in a variable.
- ∆x the change in variable x
- (set theory) The symmetric difference symbol.
- (mathematics, physics) The Laplace operator.
- Synonym: ∇²
Usage notes
- Although this is the official encoding for the mathematical character, most math publications that apply Unicode (LaTeX publications rarely use Unicode) use simply the Greek letter Δ for convenience.
Synonyms
English
Etymology
From translingual ∆ (“change”).
Noun
∆ (plural ∆s)
- (Reddit) An award given to someone who successfully convinces someone to change their viewpoint.
- 2025 April, “Can AI Change Your View? Evidence from a Large-Scale Online Field Experiment”, in University of Zurich, pages 2, 5:
- In Figure 3, we report the fraction of comments that received a ∆ for each treatment condition. Meanwhile, ∆s can be awarded to any type of comment, without restrictions.