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2. Dimensionality reduction - Wikipedia

   en.wikipedia.org/wiki/Dimensionality_reduction

   Dimensionality reduction. Dimensionality reduction, or dimension reduction, is the transformation of data from a high-dimensional space into a low-dimensional space so that the low-dimensional representation retains some meaningful properties of the original data, ideally close to its intrinsic dimension. Working in high-dimensional spaces can ...

3. Reduction (mathematics) - Wikipedia

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

   In mathematics, reduction refers to the rewriting of an expression into a simpler form. For example, the process of rewriting a fraction into one with the smallest whole-number denominator possible (while keeping the numerator a whole number) is called "reducing a fraction". Rewriting a radical (or "root") expression with the smallest possible ...

4. List of country calling codes - Wikipedia

   en.wikipedia.org/wiki/List_of_country_calling_codes

   Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.

5. Nitrile reduction - Wikipedia

   en.wikipedia.org/wiki/Nitrile_reduction

   With diisobutylaluminium hydride[edit] The mechanism for the reduction of a nitrile to an aldehyde with DIBAL-H. The hydride reagent Diisobutylaluminium hydride, or DIBAL-H, is commonly used to convert nitriles to the aldehyde. [14] Regarding the proposed mechanism, DIBAL forms a Lewis acid-base adduct with the nitrile by formation of an N-Al bond.

6. Title 38 of the Code of Federal Regulations - Wikipedia

   en.wikipedia.org/wiki/Title_38_of_the_Code_of...

   Title 38 is the principal set of rules and regulations issued by federal agencies of the United States regarding pensions, bonuses, and veterans ' relief. It is available in digital and printed form, and can be referenced online using the Electronic Code of Federal Regulations (e-CFR).

7. Variance reduction - Wikipedia

   en.wikipedia.org/wiki/Variance_reduction

   In mathematics, more specifically in the theory of Monte Carlo methods, variance reduction is a procedure used to increase the precision of the estimates obtained for a given simulation or computational effort. [1] Every output random variable from the simulation is associated with a variance which limits the precision of the simulation results ...