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  2. Theta - Wikipedia

    en.wikipedia.org/wiki/Theta

    The cursive form ϑ was retained by Unicode as U+03D1 ϑ GREEK THETA SYMBOL, separate from U+03B8 θ GREEK SMALL LETTER THETA. (There is also U+03F4 ϴ GREEK CAPITAL THETA SYMBOL .) For the purpose of writing Greek text, the two can be font variants of a single character, but θ and ϑ are also used as distinct symbols in technical and ...

  3. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.

  4. Mathematical Alphanumeric Symbols - Wikipedia

    en.wikipedia.org/wiki/Mathematical_Alphanumeric...

    Mathematical Alphanumeric Symbols is a Unicode block comprising styled forms of Latin and Greek letters and decimal digits that enable mathematicians to denote different notions with different letter styles. The letters in various fonts often have specific, fixed meanings in particular areas of mathematics.

  5. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...

  6. Spherical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Spherical_coordinate_system

    Both the use of symbols and the naming order of tuple coordinates differ among the several sources and disciplines. This article will use the ISO convention [ 1 ] frequently encountered in physics , where the naming tuple gives the order as: radial distance, polar angle, azimuthal angle, or ( r , θ , φ ) {\displaystyle (r,\theta ,\varphi )} .

  7. Null sign - Wikipedia

    en.wikipedia.org/wiki/Null_sign

    It sometimes take the form of U+03D5 ϕ GREEK PHI SYMBOL and is used as a sign in different fields of studies. The U+0278 ɸ LATIN SMALL LETTER PHI is used in the IPA for voiceless bilabial fricative. Greek letter Θ: majuscule U+0398 Θ GREEK CAPITAL LETTER THETA and minuscule U+03B8 θ GREEK SMALL LETTER THETA are a part of the Greek alphabet.

  8. Small-angle approximation - Wikipedia

    en.wikipedia.org/wiki/Small-angle_approximation

    The sine and tangent small-angle approximations are used in relation to the double-slit experiment or a diffraction grating to develop simplified equations like the following, where y is the distance of a fringe from the center of maximum light intensity, m is the order of the fringe, D is the distance between the slits and projection screen ...

  9. Mathematical operators and symbols in Unicode - Wikipedia

    en.wikipedia.org/wiki/Mathematical_operators_and...

    greek theta symbol u+03d2: ϒ: greek upsilon with hook symbol u+03d5: ϕ: greek phi symbol u+03f0: ϰ: greek kappa symbol u+03f1: ϱ: greek rho symbol u+03f4: ϴ: greek capital theta symbol u+03f5: ϵ: greek lunate epsilon symbol u+03f6 ϶ greek reversed lunate epsilon symbol