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Around 1880 there were discovered abstract math objects called groups
(this is a math term and is unrelated to usage of the word group
in ordinary English). During 20th-21th century the importance of groups was on rise. Now most of quantitative sciences rely on the concept of groups. All the high-tech economy relies on groups (without groups we hardly would be able to discover quantum mechanics, and therefore would have no computers, smartphones, and LCD displays).
In 2019 there were discovered ordered semicategory actions
. By all basic heuristic mathematical indications, ordered semicategory actions are as important as groups. But because ordered semicategory actions were discovered by an amateur (not a math professor), the texts related to them were published in a wrong way (basically, as a too long 400 pages article, not matching the length standards of scientific journals), publishing ordered semicategory actions became a challenging task. Because they are not officially published, mathematicians do not want to build new math based on ordered semicategory actions.
Wrong publication of mathematics is essentially making mankind stupid, as it makes people unable to use and develop further innovative thinking methods.