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  2. SCP Foundation - Wikipedia

    en.wikipedia.org/wiki/SCP_Foundation

    The SCP Foundation is a fictional organization featuring in stories created by the SCP Wiki, a wiki-based collaborative writing project.. Within the project's shared fictional universe, the SCP Foundation is a secret organization that is responsible for capturing, containing, and studying various paranormal, supernatural, and other mysterious phenomena (known as "anomalies" or "SCPs"), while ...

  3. Euclid - Wikipedia

    en.wikipedia.org/wiki/Euclid

    Euclid (/ ˈ j uː k l ɪ d /; Greek: Εὐκλείδης; fl. 300 BC) was an ancient Greek mathematician active as a geometer and logician. Considered the "father of geometry", he is chiefly known for the Elements treatise, which established the foundations of geometry that largely dominated the field until the early 19th century.

  4. SCP – Containment Breach - Wikipedia

    en.wikipedia.org/wiki/SCP_–_Containment_Breach

    SCP – Containment Breach is a horror and indie game developed by Joonas "Regalis" Rikkonen based on fictional stories from the SCP Foundation collaborative writing wiki.The player takes the role of a human test subject, also known as a Class-D in the Community, and is imprisoned in an underground testing facility devoted to containing and studying anomalous entities and artifacts known as SCPs.

  5. Keter - Wikipedia

    en.wikipedia.org/wiki/Keter

    v. t. e. Keter or Kether ( Hebrew : כֶּתֶר ‎ ⓘ, Keṯer, lit. "crown") is the topmost of the sefirot of the Tree of Life in Kabbalah. Since its meaning is "crown", it is interpreted as both the "topmost" of the Sefirot and the "regal crown" of the Sefirot. It is between Chokhmah and Binah (with Chokhmah on the right and Binah on the ...

  6. Parallel postulate - Wikipedia

    en.wikipedia.org/wiki/Parallel_postulate

    In geometry, the parallel postulate, also called Euclid 's fifth postulate because it is the fifth postulate in Euclid's Elements, is a distinctive axiom in Euclidean geometry. It states that, in two-dimensional geometry: If a line segment intersects two straight lines forming two interior angles on the same side that are less than two right ...

  7. Euclidean geometry - Wikipedia

    en.wikipedia.org/wiki/Euclidean_geometry

    Euclidean geometry is a mathematical system attributed to ancient Greek mathematician Euclid, which he described in his textbook on geometry, Elements. Euclid's approach consists in assuming a small set of intuitively appealing axioms (postulates) and deducing many other propositions ( theorems) from these. Although many of Euclid's results had ...

  8. Euclidean space - Wikipedia

    en.wikipedia.org/wiki/Euclidean_space

    A point in three-dimensional Euclidean space can be located by three coordinates. Euclidean space is the fundamental space of geometry, intended to represent physical space. Originally, in Euclid's Elements, it was the three-dimensional space of Euclidean geometry, but in modern mathematics there are Euclidean spaces of any positive integer ...

  9. Euclid's Elements - Wikipedia

    en.wikipedia.org/wiki/Euclid's_Elements

    The Elements ( Greek: Στοιχεῖα Stoikheîa) is a mathematical treatise consisting of 13 books attributed to the ancient Greek mathematician Euclid c. 300 BC. It is a collection of definitions, postulates, propositions ( theorems and constructions ), and mathematical proofs of the propositions. The books cover plane and solid Euclidean ...