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Frontier Thesis. The Frontier Thesis, also known as Turner's Thesis or American frontierism, is the argument advanced by historian Frederick Jackson Turner in 1893 that the settlement and colonization of the rugged American frontier was decisive in forming the culture of American democracy and distinguishing it from European nations.
Theory. Fukui realized that a good approximation for reactivity could be found by looking at the frontier orbitals ( HOMO/LUMO ). This was based on three main observations of molecular orbital theory as two molecules interact: The occupied orbitals of different molecules repel each other. Positive charges of one molecule attract the negative ...
HOMO and LUMO are sometimes collectively called the frontier orbitals, such as in the frontier molecular orbital theory. Gap [ edit ] The energy difference between the HOMO and LUMO is the HOMO–LUMO gap .
With a risk-free asset, the straight capital allocation line is the efficient frontier. In modern portfolio theory, the efficient frontier (or portfolio frontier) is an investment portfolio which occupies the "efficient" parts of the risk–return spectrum. Formally, it is the set of portfolios which satisfy the condition that no other ...
"The Significance of the Frontier in American History" is a seminal essay by the American historian Frederick Jackson Turner which advanced the Frontier thesis of American history. Turner's thesis had a significant impact on how people in the late 19th and early 20th centuries understood American identity, character, and national growth.
Modern portfolio theory (MPT), or mean-variance analysis, is a mathematical framework for assembling a portfolio of assets such that the expected return is maximized for a given level of risk. It is a formalization and extension of diversification in investing, the idea that owning different kinds of financial assets is less risky than owning ...
Klopman–Salem equation. In the theory of chemical reactivity, the Klopman–Salem equation describes the energetic change that occurs when two species approach each other in the course of a reaction and begin to interact, as their associated molecular orbitals begin to overlap with each other and atoms bearing partial charges begin to ...
Production–possibility frontier. In microeconomics, a production–possibility frontier ( PPF ), production possibility curve ( PPC ), or production possibility boundary ( PPB) is a graphical representation showing all the possible options of output for two goods that can be produced using all factors of production, where the given resources ...