Lambda is the 11th letter of the Greek alphabet. It represents the number 30 in gematria. Lambda took its root from the Phoenician letter lamed (or l?med), which is used to denote "goad". The letter represents "l" sound. The capital lambda is used to show the von Mangoldt function in mathematics. In addition, you can see the usage of the letter in electromagnetism, linear algebra, etc. The minuscule lambda is used as a symbol in radioactivity, astronomy, mathematics, statistics, physics, and engineering etc. The letter lambda was also a widely known Spartan symbol.
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