In computational complexity theory, the complexity class ELEMENTARY of elementary recursive functions is the union of the classes
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{\displaystyle {\begin{aligned}{\mathsf {ELEMENTARY}}&=\bigcup _{k\in \mathbb {N} }k{\mathsf {{\mbox{-}}EXP}}\\&={\mathsf {DTIME}}\left(2^{n}\right)\cup {\mathsf {DTIME}}\left(2^{2^{n}}\right)\cup {\mathsf {DTIME}}\left(2^{2^{2^{n}}}\right)\cup \cdots \end{aligned}}}
The name was coined by László Kalmár, in the context of recursive functions and undecidability; most problems in it are far from elementary. Some natural recursive problems lie outside ELEMENTARY, and are thus NONELEMENTARY. Most notably, there are primitive recursive problems that are not in ELEMENTARY. We know
LOWER-ELEMENTARY ⊊ EXPTIME ⊊ ELEMENTARY ⊊ PR ⊊ RWhereas ELEMENTARY contains bounded applications of exponentiation (for example,
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{\displaystyle O(2^{2^{n}})}
), PR allows more general hyper operators (for example, tetration) which are not contained in ELEMENTARY.
The most highly regarded teaching text book on the Japanese language. This is the companion workbook to the text. In Japanese/English.
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good morning po, may e-book po ba kayo ng Elementary Surveying by Juny Pilapil La Putt? pwede po pahingi ng copy. need ko lang po ngayon for my course subject. thank you po.
Hello po.
Sino po rito yung may e-book ng Elementary Surveying authored by Juny Pilapil La Putt? Pahingi po sana ng copy. Needed po kasi sa subject namin this semester.
Thank you po.💙
Currently I am using Ubuntu. I'm thinking of switching to other distribution and Elementary OS seems to be really nice. Any thoughts on this distribution?
elementary OS is the fast, open, and privacy-respecting alternative to Windows and macOS. Over the past year we’ve been hard at work putting together a new major version of elementary OS, codenamed Juno. It is the culmination of a ton of updates and improvements with three major goals:
Provide...