A model of computation may be defined in terms of an abstract computer, e. g., Turing machine, and / or by postulating that certain operations are executed in unit time.

In it he stated another notion of " effective computability " with the introduction of his a-machines ( now known as the Turing machine abstract computational model ).

It is conceived as an abstract machine that can be in one of a finite number of states.

Considered as an abstract model of computation, the finite state machine is weak ; it has less computational power than some other models of computation such as the Turing machine.

In the 18th century, many deists viewed God merely as an abstract and impersonal creator of the universe, which they likened to a giant machine.

In complexity theory and computability theory, an oracle machine is an abstract machine used to study decision problems.

More generally, a programming language may describe computation on some, possibly abstract, machine.

3GLs are more abstract and are " portable ", or at least implemented similarly on computers that do not support the same native machine code.

The Standard Pascal Model Implementation was also based on this compiler, having been adapted, by Welsh and Hay at Manchester University in 1984, to check rigorously for conformity to the BSI 6192 / ISO 7185 Standard and to generate code for a portable abstract machine.

* Abstract interpretation models the effect that every statement has on the state of an abstract machine ( i. e., it ' executes ' the software based on the mathematical properties of each statement and declaration ).

This abstract machine over-approximates the behaviours of the system: the abstract system is thus made simpler to analyze, at the expense of incompleteness ( not every property true of the original system is true of the abstract system ).

The SECD machine is a highly influential virtual machine and abstract machine intended as a target for functional programming language compilers.

In computability theory, several closely related terms are used to describe the computational power of a computational system ( such as an abstract machine or programming language ):

; Machine independent vs machine dependent: Many optimizations that operate on abstract programming concepts ( loops, objects, structures ) are independent of the machine targeted by the compiler, but many of the most effective optimizations are those that best exploit special features of the target platform.

The SSP implements the Basic Call State Machine ( BCSM ) which is a Finite state machine that represents an abstract view of a call from beginning to end ( off hook, dialing, answer, no answer, busy, hang up, etc .).

Like any other Java program, they must be executed within a Java virtual machine ( JVM ) that integrates with the server's host operating system to provide an abstract platform-neutral environment.

Turing tarpits are characterized by having a simple abstract machine which requires the user to deal with many details in the solution of a problem.

An abstract machine, also called an abstract computer, is a theoretical model of a computer hardware or software system used in automata theory.

An operational approach to sociology can never expect abstract certainty, since it is certainty which every new discovery in science either replaces or reshapes.

On a more abstract level, model theoretic arguments hold that a given set of symbols in a theory can be mapped onto any number of sets of real-world objects — each set being a " model " of the theory — providing the interrelationships between the objects are the same.

The term abstract data type can also be regarded as a generalised approach of a number of algebraic structures, such as lattices, groups, and rings.

However, unlike Alberti and Leonardo, Dürer was most troubled by understanding not just the abstract notions of beauty but also as to how an artist can create beautiful images.

An abstraction can be seen as a process of mapping multiple different pieces of constituent data to a single piece of abstract data based on similarities in the constituent data, for example many different physical cats map to the abstraction " CAT ".

The main disadvantage of abstraction is that highly abstract concepts are more difficult to learn, and require a degree of mathematical maturity and experience before they can be assimilated.

The conditions themselves can be stated in an abstract form, so that they make sense for any partially ordered set.

It can also be used to denote abstract vectors and linear functionals in mathematics.

( In particular, the exponential map can be used to define abstract index groups.

Because these two definitions can be transformed simply by into the other, some formulae have this alternatingly (- 1 )< sup > n </ sup >- term and others not depending on the context, but it is not possible to decide in favor of one of these definitions to be the correct or appropriate or natural one ( for the abstract Bernoulli numbers ).

Such a pair of adjoint functors typically arises from a construction defined by a universal property ; this can be seen as a more abstract and powerful view on universal properties.

They represent two abstract and complementary aspects that every phenomenon in the universe can be divided into.

* A set is an abstract data structure that can store specific values, without any particular order, and no repeated values.

Modern deists believe that they must continue what the classical deists started and continue to use modern human knowledge to come to understand God, which in turn is why a human-like God that can lead to numerous contradictions and inconsistencies is no longer believed in and has been replaced with a much more abstract conception.

In computer science, a double-ended queue ( dequeue, often abbreviated to deque, pronounced deck ) is an abstract data type that implements a queue for which elements can only be added to or removed from the front ( head ) or back ( tail ).

This differs from the queue abstract data type or First-In-First-Out List ( FIFO ), where elements can only be added to one end and removed from the other.

In a more abstract sense, by making excuses, we can externalize the guilt associated with our actions.

In mathematics, more specifically in abstract algebra and ring theory, a Euclidean domain ( also called a Euclidean ring ) is a ring that can be endowed with a certain structure – namely a Euclidean function, to be described in detail below – which allows a suitable generalization of the Euclidean division of the integers.

The interaction of sub-atomic particles can be complex and difficult to understand intuitively, and the Feynman diagrams allow for a simple visualization of what would otherwise be a rather arcane and abstract formula.

In the mathematical field of representation theory, group representations describe abstract groups in terms of linear transformations of vector spaces ; in particular, they can be used to represent group elements as matrices so that the group operation can be represented by matrix multiplication.

We can solve both problems using a more abstract definition of the exponential map that works for all Lie groups, as follows.

The abstract of his paper on endoscopic appendectomy can be found at here.

The styles can vary from abstract to trompe-l ' œil ( a French term for " fool " or " trick the eye ").