differential-equations DE1 - "l" in subtitles should be "L"

[davidBar-On]

Original More specifically, one with a period of 2 pi times the square root of l over g, where l is the length of the pendulum and g is the strength of gravity.

Time: 370.77 - 381.17

Line Entry # 44 Line # ~355

Describe the issue "l" in this and other related sentences should be "L", as shown in the video.