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  2. File:IRS Form 1040, 2018.pdf - Wikipedia

    en.wikipedia.org/wiki/File:IRS_Form_1040,_2018.pdf

    Original file (1,275 × 1,650 pixels, file size: 146 KB, MIME type: application/pdf, 2 pages) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  3. Quadric (algebraic geometry) - Wikipedia

    en.wikipedia.org/wiki/Quadric_(algebraic_geometry)

    (A homogeneous polynomial is also called a form, and so q may be called a quadratic form.) If q is the product of two linear forms, then X is the union of two hyperplanes . It is common to assume that n ≥ 1 {\displaystyle n\geq 1} and q is irreducible , which excludes that special case.

  4. IRS tax forms - Wikipedia

    en.wikipedia.org/wiki/IRS_tax_forms

    The first Form 1040 was published for use for the tax years 1913, 1914, and 1915. For 1916, Form 1040 was converted to an annual form (i.e., updated each year with the new tax year printed on the form). [3] Initially, the IRS mailed tax booklets (Form 1040, instructions, and most common attachments) to all households.

  5. Quartic surface - Wikipedia

    en.wikipedia.org/wiki/Quartic_surface

    This is a surface in affine space A 3. On the other hand, a projective quartic surface is a surface in projective space P 3 of the same form, but now f is a homogeneous polynomial of 4 variables of degree 4, so for example ⁠ f ( x , y , z , w ) = x 4 + y 4 + x y z w + z 2 w 2 − w 4 {\displaystyle f(x,y,z,w)=x^{4}+y^{4}+xyzw+z^{2}w^{2}-w^{4

  6. Second fundamental form - Wikipedia

    en.wikipedia.org/wiki/Second_fundamental_form

    and the second fundamental form at the origin in the coordinates (x,y) is the quadratic form L d x 2 + 2 M d x d y + N d y 2 . {\displaystyle L\,dx^{2}+2M\,dx\,dy+N\,dy^{2}\,.} For a smooth point P on S , one can choose the coordinate system so that the plane z = 0 is tangent to S at P , and define the second fundamental form in the same way.

  7. Algebraic surface - Wikipedia

    en.wikipedia.org/wiki/Algebraic_surface

    The general type class, of Kodaira dimension 2, is very large (degree 5 or larger for a non-singular surface in P 3 lies in it, for example). There are essential three Hodge number invariants of a surface. Of those, h 1,0 was classically called the irregularity and denoted by q; and h 2,0 was called the geometric genus p g.

  8. Social Security: Use this IRS form to have federal income tax ...

    www.aol.com/social-security-irs-form-federal...

    Once the form is completed, return it to your local Social Security office by mail or in person. If you want to make any changes in the future, you’ll need to fill out a new Form W-4V.

  9. Quadric - Wikipedia

    en.wikipedia.org/wiki/Quadric

    This form is called the normal form of the equation, since two quadrics have the same normal form if and only if there is a Euclidean transformation that maps one quadric to the other. The normal forms are as follows: