**Science and Mathematics**

- Level (algebra), the least number of squares that sum to in a field
- Level set, a set where a function takes on a given constant value
- Level measurement, instrumentation techniques to measure height within a vessel
- Level of measurement, a theory of the kinds of scales or levels used for measuring
- Level, for a Categorical variable in statistics, the different values that such a variable can have
- Level, in Applied statistics, the different values that a factor can have
- Level, in the Design of experiments, the different treatments that are applied within a factor
- Classification levels, in Biological organisation, classrooms, churches, hospitals among others

- Energy levels, discrete amounts of energy that can be held by a quantum mechanical system or confined particle

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### Famous quotes containing the words science and, science and/or mathematics:

“*Science and* art, or by the same token, poetry and prose differ from one another like a journey and an excursion. The purpose of the journey is its goal, the purpose of an excursion is the process.”

—Franz Grillparzer (1791–1872)

“The *science* of constructing a commonwealth, or renovating it, or reforming it, is, like every other experimental *science*, not to be taught a priori. Nor is it a short experience that can instruct us in that practical *science*, because the real effects of moral causes are not always immediate.”

—Edmund Burke (1729–1797)

“In *mathematics* he was greater

Than Tycho Brahe, or Erra Pater:

For he, by geometric scale,

Could take the size of pots of ale;

Resolve, by sines and tangents straight,

If bread and butter wanted weight;

And wisely tell what hour o’ th’ day

The clock doth strike, by algebra.”

—Samuel Butler (1612–1680)