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  2. Carbon nanotube - Wikipedia

    en.wikipedia.org/wiki/Carbon_nanotube

    The pair (2,0) would theoretically yield a chain of fused 4-cycles; and (1,1), the limiting "armchair" structure, would yield a chain of bi-connected 4-rings. These structures may not be realizable. The thinnest carbon nanotube proper is the armchair structure with type (2,2), which has a diameter of 0.3 nm.

  3. Ferrocyanide - Wikipedia

    en.wikipedia.org/wiki/Ferrocyanide

    Ferrocyanide is the name of the anion [Fe 6] 4−. Salts of this coordination complex give yellow solutions. It is usually available as the salt potassium ferrocyanide, which has the formula K 4 Fe(CN) 6. [Fe(CN) 6] 4− is a diamagnetic species, featuring low-spin iron(II) center in an octahedral ligand environment.

  4. Turnstile (symbol) - Wikipedia

    en.wikipedia.org/wiki/Turnstile_(symbol)

    The turnstile represents a binary relation.It has several different interpretations in different contexts: . In epistemology, Per Martin-Löf (1996) analyzes the symbol thus: "...[T]he combination of Frege's Urteilsstrich, judgement stroke [ | ], and Inhaltsstrich, content stroke [—], came to be called the assertion sign."

  5. FE-Schrift - Wikipedia

    en.wikipedia.org/wiki/FE-Schrift

    The FE-Schrift was found to perform better against alteration and falsification in comparison to the Brazilian Mandatory script as shown in a test at the INTI. [13] The design also includes a blue strip above the registration code with the Mercosur emblem in the left upper corner, the national flag of the member state in the right upper corner ...

  6. Infinite monkey theorem - Wikipedia

    en.wikipedia.org/wiki/Infinite_monkey_theorem

    While a monkey is used as a mechanism for the thought experiment, it would be unlikely to ever write Hamlet, according to researchers.. The infinite monkey theorem states that a monkey hitting keys at random on a typewriter keyboard for an infinite amount of time will almost surely type any given text, including the complete works of William Shakespeare.

  7. Infinity symbol - Wikipedia

    en.wikipedia.org/wiki/Infinity_symbol

    The infinity symbol (∞) is a mathematical symbol representing the concept of infinity.This symbol is also called a lemniscate, [1] after the lemniscate curves of a similar shape studied in algebraic geometry, [2] or "lazy eight", in the terminology of livestock branding.

  8. Ambigram - Wikipedia

    en.wikipedia.org/wiki/Ambigram

    An ambigram is a calligraphic composition of glyphs (letters, numbers, symbols or other shapes) that can yield different meanings depending on the orientation of observation. [ 2 ] [ 3 ] Most ambigrams are visual palindromes that rely on some kind of symmetry , and they can often be interpreted as visual puns . [ 4 ]

  9. Quantum yield - Wikipedia

    en.wikipedia.org/wiki/Quantum_yield

    In particle physics, the quantum yield (denoted Φ) of a radiation-induced process is the number of times a specific event occurs per photon absorbed by the system. [ 1 ] Φ ( λ ) = number of events number of photons absorbed {\displaystyle \Phi (\lambda )={\frac {\text{ number of events }}{\text{ number of photons absorbed }}}}