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Let $\Bbb{P}$ be the set of prime numbers in $\Bbb{N}$.
Well known open problem:
$$
\Delta\Bbb{P} := \{ p - q : p,q \in \Bbb{P}\} = \Bbb{Z}
$$
If $2n$ doesn't occur, then adjacent gaps $\{ n\}, \dots , \{2, 2n-2\}$ do not occur.
Let $(g_1, \dots, g_k), g_i \in \Bbb{Z}$ represent an adjacent g...
Define $T^k(\Omega)$, $\Omega$ an open subset of $\mathbb{R}^m$ (with a smooth boundary), as a space of function equivalance classes, with the norm defined as $$ \|f\|_{T^k(\Omega)} = \|f\|_{L^2(\Omega)} + \|(\sum\limits_{i=1}^m(\frac{\partial^{k}f}{\partial x_i^{k}})^2)^{\frac{1}{2}}\|_{L^2(...
The term White Australia policy comprises various historical policies that effectively barred people of non-European descent from immigrating to Australia. There was never any specific policy titled as such, but the term was invented later to encapsulate a collection of policies that were designed to exclude people from Asia (particularly China) and the Pacific Islands (particularly Melanesia) from immigrating to Australia. These policies were progressively dismantled between 1949 and 1973.Competition in the gold fields between British and Chinese miners, and labour union opposition to the ...
Retard when used as a noun is a pejorative word used to refer to people with mental disabilities. The word has gained notoriety for causing a growing number of mentally disabled people to feel unfairly stereotyped.
== Etymology ==
The word retard dates as far back as 1426. It stems from the Latin verb retardare, meaning to hinder or make slow. The English adopted the word and used it as similar meaning, slow and delayed. The first time the word "retard" was printed in American newspapers was in 1704. At this time, it was used in a way to describe the slowing down or the diminishing of something...
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