Englishman harriot began to use the common symbol "greater than" in 163 1. And "less than" symbol.

Poincare and Borel introduced the symbols << (far less than) and >> (far greater than), which were quickly accepted by the mathematical community and are still in use today.

In music, ">" and "

Extended data:

?

phonetic symbol/transcription

1: A semitone sign (#) indicates that the basic volume is raised by semitone.

2: The falling tone symbol (b) indicates that the basic sound level is lowered by a semitone.

3: The double rising sign (×) indicates that the basic sound level is raised by two semitones (a whole tone).

4: Re-scaling (bb) means that the basic sound level is reduced by two semitones (one whole tone).

5: Minus sign (? ) means to restore the sound that has been raised or lowered. ?

The change mark applies only to one bar.

repeat

Mark from the beginning: d.c. repeat from the beginning. When the fine mark appears, repeat the operation until the fine mark ends.

Mark it repeatedly from mark: D.

South repeats from this mark to the mark as shown in the figure.

Paragraph repetition mark: from: || to ||:, if there is no corresponding ||:, start from the beginning.

Mark (house) repeatedly at different ends: when playing, enter the house of 1 first, then enter the house of 2.

Section Repetition: There are 2 sections in the next section, so this section is repeated twice? .

Baidu Encyclopedia-Greater than Numbers

Baidu Encyclopedia-music notation