In mathematics, what is the name of the symbol like B but below B, and how to type it on the computer? .

Greek letter β, the computer input method is as follows:

1. Take sogou input method as an example, and right-click input method.

2. In the pop-up list, select "soft keyboard"-"2 Greek letters".

3. In the dialog box, click the key of the letter B with the mouse and insert the symbol β.

4. You can insert other Greek letters at the same time, just click the mouse.

α、β、γ、δ、ε、ζ、η、θ、ι。

κ、λ、μ、ν、ξ、ο、π、ρ。

σ、τ、υ、φ、χ、ψ、ω。