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Florian Cajori, A History of Mathematical Notations (1929), 2 volumes. ISBN 0-486-67766-4; Mazur, Joseph (2014), Enlightening Symbols: A Short History of Mathematical Notation and Its Hidden Powers. Princeton, New Jersey: Princeton University Press. ISBN 978-0-691-15463-3; Rojas, Raúl (2025). The Language of Mathematics: The Stories behind the ...
Chromatic circle diagrams of the four common ancohemitonic heptatonic scales. A heptatonic scale is a musical scale that has seven pitches, or tones, per octave.Examples include:
A triple-dotted note is a note with three dots written after it; its duration is 1 + 7 ⁄ 8 times its basic note value. Use of a triple-dotted note value is not common in the Baroque and Classical periods, but quite common in the music of Richard Wagner and Anton Bruckner , especially in their brass parts.