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  2. Hard cases make bad law - Wikipedia

    en.wikipedia.org/wiki/Hard_cases_make_bad_law

    Hard cases make bad law is an adage or legal maxim meaning that an extreme case is a poor basis for a general law that would cover a wider range of less extreme cases. In other words, a general law is better drafted for the average circumstance as this will be more common.

  3. Computational hardness assumption - Wikipedia

    en.wikipedia.org/wiki/Computational_hardness...

    Computational hardness assumption. In computational complexity theory, a computational hardness assumption is the hypothesis that a particular problem cannot be solved efficiently (where efficiently typically means "in polynomial time "). It is not known how to prove (unconditional) hardness for essentially any useful problem.

  4. Hard water - Wikipedia

    en.wikipedia.org/wiki/Hard_water

    Hard water is water that has a high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone, chalk or gypsum, [ 1] which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates . Drinking hard water may have moderate health benefits.

  5. Hard Case Crime - Wikipedia

    en.wikipedia.org/wiki/Hard_Case_Crime

    Hard Case Crime is an American imprint of hardboiled crime novels founded in 2004 by Charles Ardai and Max Phillips. [ 1][ 2] The series recreates, in editorial form and content, the flavor of the paperback crime novels of the 1940s and '50s. The covers feature original illustrations done in a style that was common for paperbacks of that era ...

  6. Computer hardware - Wikipedia

    en.wikipedia.org/wiki/Computer_hardware

    Computer hardware. PDP-11 CPU board. Computer hardware includes the physical parts of a computer, such as the central processing unit (CPU), random access memory (RAM), motherboard, computer data storage, graphics card, sound card, and computer case. It includes external devices such as a monitor, mouse, keyboard, and speakers. [ 1][ 2]

  7. NP-hardness - Wikipedia

    en.wikipedia.org/wiki/NP-hardness

    In computational complexity theory, a computational problem H is called NP-hard if, for every problem L which can be solved in non-deterministic polynomial-time, there is a polynomial-time reduction from L to H. That is, assuming a solution for H takes 1 unit time, H ' s solution can be used to solve L in polynomial time.

  8. Case-hardening - Wikipedia

    en.wikipedia.org/wiki/Case-hardening

    Case-hardening. Colt Peacemaker, showing discoloration from case-hardening. Case-hardening or carburization is the process of introducing carbon to the surface of a low carbon iron or much more commonly low carbon steel object in order to enable the surface to be hardened. Iron which has a carbon content greater than ~0.02% is known as steel.

  9. Computer case - Wikipedia

    en.wikipedia.org/wiki/Computer_case

    The fans are also at the rear and front. The power supply is on the bottom rear. A computer case, also known as a computer chassis, is the enclosure that contains most of the hardware of a personal computer. The components housed inside the case (such as the CPU, motherboard, memory, mass storage devices, power supply unit and various expansion ...