Theorem - Abegg's Rule

Subject - Chemistry
Period -
Creation - 1904
Founded by - Richard Abegg
Proponents - Gilbert N. Lewis

In more archaic terms it tells us the solubility of akali metals with strong acids decrease as you descend on the akali metal group, while the solubility will increase in weak acids when you descend the same group. There is an exception for the solubility of salt in water, but otherwise this rule held experimentally.


Subject - Chemistry
Period -
Creation - 1904
Founded by - Richard Abegg
Proponents - Gilbert N. Lewis


There is another rule that goes by the same name, or also known as Abegg's rule of 8.This is an old chemistry rule that states deals with the valence levels in molecules, saying that the positive and negative valency of an element is frequently eight.

Theorem - ABC Model

Subject - Psychology
Period -
Creation - 1921
Founded by - Aaron T. Beck, Burrhus Frederic Skinner
Proponents -

The ABC model is a model of behavior based on the operant conditioning paradigm, the idea that an individual's behavior can be modified through consequences. In particular this model says that you can change one's behavior with conditions that precede or follow the behavior in question. In either scenario behavior that is rewarded will occur more frequently and behavior that is punished will occur less frequently.

Theorem - ABC Conjecture

Subject - Math
Period -
Creation - 1985
Founded by - J Oesterlé
Proponents - D W Masser

A conjecture stating that there exists a positive number k such that all positive integers a, b and c where:
a + b = c
(a, b, c) = 1
will result in:
z < G ^k
Where G is the greatest square-free factor of abc.

This has profound implications in the study of Diophantine equations which are indeterminate polynomial equations with integer inputs or variables. An example of such an implication is that the abc conjecture tells us the Fermat equation has at most a finite number of solutions.

Theorem - Abandonment

Subject - Philosophy
Period - 20^th Century
Creation - Søren Kierkegaard, Frederich Nietzsche
Founded by -
Proponents - Sartre

Abandonment is a central concept to atheistic existentialism. The idea is that god does not exist which means that life has no intrinsic purpose or meaning. The idea is that man was "abandoned" in our universe and must create their own morality and code without divine assistance.

Theorem-A Priori Theories

Subject - Accounting
Period - 1960s
Creation -
Founded by -
Proponents -


An approach to accounting that was based heavily on using deductive reasoning for the development and improvement of accounting systems. This is the reason for the term A priori as the latin translation of a priori means justification independent of experience. Thus the proponents of A Priori accountancy theories use assumed axioms, or premises, rather than empirical, or experimental evidence to relate cause and effect.