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2. Worksheet - Wikipedia

   en.wikipedia.org/wiki/Worksheet

   In accounting, a worksheet is, or was, a sheet of ruled paper with rows and columns on which an accountant could record information or perform calculations. These are often called columnar pads, and typically green-tinted. In computing, spreadsheet software presents, on a computer monitor, a user interface that resembles one or more paper ...

3. Tracing paper - Wikipedia

   en.wikipedia.org/wiki/Tracing_paper

   Description. Tracing paper is paper made to have low opacity, allowing light to pass through. It is named as such for its ability for an image to be traced onto it. The modern version of tracing paper was developed for architects and design engineers to create drawings which could be copied precisely using the diazo copy process. [ 2] When ...

4. Locard's exchange principle - Wikipedia

   en.wikipedia.org/wiki/Locard's_exchange_principle

   Dr. Edmond Locard (1877–1966) was a pioneer in forensic science who became known as the Sherlock Holmes of Lyon, France. [ 1] He formulated the basic principle of forensic science as: "Every contact leaves a trace". It is generally understood as "with contact between two items, there will be an exchange."

5. Constructive solid geometry - Wikipedia

   en.wikipedia.org/wiki/Constructive_solid_geometry

   Constructive solid geometry ( CSG; formerly called computational binary solid geometry) is a technique used in solid modeling. Constructive solid geometry allows a modeler to create a complex surface or object by using Boolean operators to combine simpler objects, [ 1] potentially generating visually complex objects by combining a few primitive ...

6. Curve sketching - Wikipedia

   en.wikipedia.org/wiki/Curve_sketching

   In geometry, curve sketching (or curve tracing) are techniques for producing a rough idea of overall shape of a plane curve given its equation, without computing the large numbers of points required for a detailed plot. It is an application of the theory of curves to find their main features.

7. Trace (linear algebra) - Wikipedia

   en.wikipedia.org/wiki/Trace_(linear_algebra)

   Trace (linear algebra) In linear algebra, the trace of a square matrix A, denoted tr (A), [ 1] is defined to be the sum of elements on the main diagonal (from the upper left to the lower right) of A. The trace is only defined for a square matrix ( n × n ). In mathematical physics texts, if tr (A) = 0 then the matrix is said to be traceless.