license: This image is a derivative work of the following images: File:Pi-symbol.svg licensed with PD-self 2010-03-03T22:13:11Z Darth Stabro 588x569 (960
DescriptionGreeklc lambda.svg English: Lowercase Greek letter Λ, the 11th letter of the Greek alphabet: λ (U+03BB). Times New Roman font. Date 11 January