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2. Bretschneider's formula - Wikipedia

   en.wikipedia.org/wiki/Bretschneider's_formula

   Introducing the semiperimeter the above becomes and Bretschneider's formula follows after taking the square root of both sides: The second form is given by using the cosine half-angle identity yielding Emmanuel García has used the generalized half angle formulas to give an alternative proof. [1]

3. Geometric distribution - Wikipedia

   en.wikipedia.org/wiki/Geometric_distribution

   The geometric distribution is the discrete probability distribution that describes when the first success in an infinite sequence of independent and identically distributed Bernoulli trials occurs. Its probability mass function depends on its parameterization and support.

4. R-value (insulation) - Wikipedia

   en.wikipedia.org/wiki/R-value_(insulation)

   R. -value (insulation) The R-value (in K ⋅ m 2/ W) is a measure of how well a two-dimensional barrier, such as a layer of insulation, a window or a complete wall or ceiling, resists the conductive [2] flow of heat, in the context of construction. [3] R-value is the temperature difference per unit of heat flux needed to sustain one unit of ...

5. Reflective surfaces (climate engineering) - Wikipedia

   en.wikipedia.org/wiki/Reflective_surfaces...

   Instruments measured weather conditions on the roof, temperatures inside the building and throughout the roof layers, and air conditioning and total building power consumption. Measurements were taken with the original black rubber roofing membrane and then after replacement with a white vinyl roof with the same insulation and HVAC systems in ...

6. AOL Mail

   mail.aol.com

   AOL Mail offers a free email service with customizable themes, tabs, and document views to enhance your inbox experience.

7. Young's inequality for products - Wikipedia

   en.wikipedia.org/wiki/Young's_inequality_for...

   Proof: Young's inequality with exponent is the special case However, it has a more elementary proof. Start by observing that the square of every real number is zero or positive.