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  2. Constructible polygon - Wikipedia

    en.wikipedia.org/wiki/Constructible_polygon

    Moreover, these equations have real rather than complex roots, so in principle can be solved by geometric construction: this is because the work all goes on inside a totally real field. In this way the result of Gauss can be understood in current terms; for actual calculation of the equations to be solved, the periods can be squared and ...

  3. Straightedge and compass construction - Wikipedia

    en.wikipedia.org/wiki/Straightedge_and_compass...

    Folds satisfying the Huzita–Hatori axioms can construct exactly the same set of points as the extended constructions using a compass and conic drawing tool. Therefore, origami can also be used to solve cubic equations (and hence quartic equations), and thus solve two of the classical problems. [19]

  4. Statically indeterminate - Wikipedia

    en.wikipedia.org/wiki/Statically_indeterminate

    In this case, the two unknowns V A and V C can be determined by resolving the vertical force equation and the moment equation simultaneously. The solution yields the same results as previously obtained. However, it is not possible to satisfy the horizontal force equation unless F h = 0. [2]

  5. Numerical methods for ordinary differential equations

    en.wikipedia.org/wiki/Numerical_methods_for...

    It costs more time to solve this equation than explicit methods; this cost must be taken into consideration when one selects the method to use. The advantage of implicit methods such as ( 6 ) is that they are usually more stable for solving a stiff equation , meaning that a larger step size h can be used.

  6. Fiber volume ratio - Wikipedia

    en.wikipedia.org/wiki/Fiber_volume_ratio

    Fiber volume ratio is an important mathematical element in composite engineering.Fiber volume ratio, or fiber volume fraction, is the percentage of fiber volume in the entire volume of a fiber-reinforced composite material. [1]

  7. Composite methods for structural dynamics - Wikipedia

    en.wikipedia.org/wiki/Composite_methods_for...

    For nonlinear dynamics, that is, the internal force is a nonlinear function with respect to , the Newton-Raphson iterations can be used to solve the nonlinear equations per step. The parameter γ {\displaystyle \gamma } is usually set as 1 2 {\displaystyle {\frac {1}{2}}} and 2 − 2 {\displaystyle 2-{\sqrt {2}}} in practice.

  8. Rule of mixtures - Wikipedia

    en.wikipedia.org/wiki/Rule_of_mixtures

    where is the volume fraction of the fibers in the composite (and is the volume fraction of the matrix).. If it is assumed that the composite material behaves as a linear-elastic material, i.e., abiding Hooke's law = for some elastic modulus of the composite and some strain of the composite , then equations 1 and 2 can be combined to give

  9. Composite number - Wikipedia

    en.wikipedia.org/wiki/Composite_number

    A composite number is a positive integer that can be formed by multiplying two smaller positive integers. Accordingly it is a positive integer that has at least one divisor other than 1 and itself. [ 1 ] [ 2 ] Every positive integer is composite, prime , or the unit 1, so the composite numbers are exactly the numbers that are not prime and not ...

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