Equation 3 · Part 2 · The Machine Before Electronics
subscript
subscript
What this part means
The lower label selects a particular version, component, or indexed member of the quantity. For example, x₀ and xₜ can be values at different positions.
Its job in the formula
A subscript distinguishes a version, component, step, or member of a quantity. It does not automatically mean multiplication.
Full expression→subscript→Article meaning
The passage around this formula
Here is a known astronomical angular frequency, while and are constituents determined by fitting the expression to a record of observed water levels at that specific place. The division of labour is the whole trick. The frequencies are universal and can be built into gearing once. The amplitudes and phases are local and must be adjustable.
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
Open the illustrated subscripts: which member of a family? guide →
Sources cited in the article section
- [3] William Thomson's Tide Predicting Machine, 1872 ↗
- [2] Tide Predicting Machines ↗
- [1] Lord Kelvin and His Analog Computer ↗
These citations provide research context; check each source for the exact claim it supports.