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2. Johnson's parabolic formula - Wikipedia

   en.wikipedia.org/wiki/Johnson's_parabolic_formula

   The slenderness ratio is an indicator of the specimen's resistance to bending and buckling, due to its length and cross section. If the slenderness ratio is less than the critical slenderness ratio, the column is considered to be a short column. In these cases, the Johnson parabola is more applicable than the Euler formula. [5]

3. Universal parabolic constant - Wikipedia

   en.wikipedia.org/wiki/Universal_parabolic_constant

   The ratio is denoted P. [1] [2] [3] In the diagram, the latus rectum is pictured in blue, the parabolic segment that it forms in red and the focal parameter in green. (The focus of the parabola is the point F and the directrix is the line L.) The value of P is [4]

4. Proportionality (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Proportionality_(mathematics)

   The ratio is called coefficient of proportionality (or proportionality constant) and its reciprocal is known as constant of normalization (or normalizing constant). Two sequences are inversely proportional if corresponding elements have a constant product, also called the coefficient of proportionality.

5. Proportion (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Proportion_(mathematics)

   A proportion is a mathematical statement expressing equality of two ratios. [1] [2]: =: a and d are called extremes, b and c are called means. Proportion can be written as =, where ratios are expressed as fractions.

6. Parabolic coordinates - Wikipedia

   en.wikipedia.org/wiki/Parabolic_coordinates

   A three-dimensional version of parabolic coordinates is obtained by rotating the two-dimensional system about the symmetry axis of the parabolas. Parabolic coordinates have found many applications, e.g., the treatment of the Stark effect and the potential theory of the edges.

7. Geometry - Wikipedia

   en.wikipedia.org/wiki/Geometry

   The golden ratio is a particular proportion that has had a controversial role in art. Often claimed to be the most aesthetically pleasing ratio of lengths, it is frequently stated to be incorporated into famous works of art, though the most reliable and unambiguous examples were made deliberately by artists aware of this legend. [135]