Definition:General Logarithm/Binary/Historical Note
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Historical Note on Binary Logarithm
The use of $\lg x$ instead of $\log_2 x$ to denote the binary logarithm was suggested by Edward M. Reingold, and adopted by Donald E. Knuth in his The Art of Computer Programming.
Sources
- 1997: Donald E. Knuth: The Art of Computer Programming: Volume 1: Fundamental Algorithms (3rd ed.) ... (previous) ... (next): $\S 1.2.2$: Numbers, Powers, and Logarithms: $(13)$