Editing Theta (section)

===Upper case===
The uppercase letter Θ is used as a symbol for:
*[[Theta function|Theta functions]]<ref>{{Cite web |title=DLMF: Chapter 20 Theta Functions |url=https://dlmf.nist.gov/20 |access-date=2025-01-31 |website=dlmf.nist.gov}}</ref>
*[[Dimensional analysis|Dimension]] of [[temperature]], by [[SI unit|SI standard]] (in italics)<ref>{{Cite book |last=Lemons |first=Don S. |title=A student's guide to dimensional analysis |date=2017 |publisher=Cambridge University Press |isbn=978-1-107-16115-3 |location=New York |pages=50 |quote=The physics of heat transfer requires two dimensions, temperature Θ and heat H, beyond those that characterize non-equilibrium dynamics.}}</ref>
*An asymptotically tight bound in the [[analysis of algorithms]] ([[big O notation]])
*A certain [[ordinal number]] in [[Θ (set theory)|set theory]]
*[[Pentaquark]]s, exotic [[baryon]]s in [[particle physics]]
*A [[Electroencephalography|brain signal frequency]] (beta, alpha, theta, delta) ranging from 4–8&nbsp;Hz
*One of the variables known as [[Greeks (finance)|"Greeks" in finance]], representing time decay of options or the change in the intrinsic value of an option divided by the number of days until the option expires<ref>{{Cite book |last=Ursone |first=Pierino |title=How to Calculate Options Prices and Their Greeks: Exploring the Black Scholes Model from Delta to Vega |date=2015 |publisher=John Wiley & Sons, Incorporated |isbn=978-1-119-01162-0 |edition=1st |series=The Wiley Finance Series |location=Newark |pages=2 |quote=Θ (time decay): the price change of an option in relation to time;}}</ref>