Entropic gravity 1970-01-01
Entropic gravity is a theoretical framework that attempts to explain gravity not as a fundamental force, but as an emergent phenomenon arising from the statistical behavior of microscopic degrees of freedom in a system, particularly in the context of thermodynamics and information theory. The concept was notably developed by physicist Erik Verlinde in a paper published in 2011. According to this viewpoint, gravity emerges from the entropy associated with the information of the positions of matter.
Entropic uncertainty 1970-01-01
Entropic uncertainty refers to a concept in quantum mechanics and information theory that quantifies the uncertainty or lack of predictability associated with measuring the state of a quantum system. It is often expressed in terms of entropy, particularly the Shannon entropy or the von Neumann entropy, which measure the amount of information that is missing or how uncertain we are about a particular variable.
Entropic vector 1970-01-01
The term "entropic vector" does not refer to a widely recognized concept in mainstream scientific literature as of my last knowledge update in October 2023. However, it may be helpful to consider the context in which the term could be used. 1. **Entropy in Physics and Information Theory**: In physics and information theory, entropy is a measure of disorder or uncertainty. It quantifies the amount of information that is missing when we do not know the exact state of a system.
Entropy (information theory) 1970-01-01
In information theory, entropy is a measure of the uncertainty or unpredictability associated with a random variable or a probability distribution. It quantifies the amount of information that is produced on average by a stochastic source of data. The concept was introduced by Claude Shannon in his seminal 1948 paper "A Mathematical Theory of Communication.
Entropy estimation 1970-01-01
Entropy estimation is a statistical method used to estimate the entropy of a probability distribution based on a sample of data. Entropy, in the context of information theory, is a measure of the uncertainty or randomness in a probability distribution. Specifically, it quantifies the expected amount of information produced by a stochastic source of data.
Entropy power inequality 1970-01-01
The Entropy Power Inequality (EPI) is a fundamental result in information theory that relates the entropy of a sum of independent random variables to their individual entropies.
Entropy rate 1970-01-01
The concept of **entropy rate** is rooted in information theory and is used to measure the average information production rate of a stochastic (random) process or a data source. In detail: 1. **Information Theory Context**: Entropy, introduced by Claude Shannon, quantifies the uncertainty or unpredictability of a random variable or source of information. The entropy \( H(X) \) of a discrete random variable \( X \) with possible outcomes \( x_1, x_2, ...
Error exponent 1970-01-01
The error exponent is a concept in information theory that quantifies the rate at which the probability of error decreases as the length of the transmitted message increases. In the context of coding and communication systems, it provides a measure of how efficiently a coding scheme can minimize the risk of errors in the transmitted data.
Error exponents in hypothesis testing 1970-01-01
In the context of hypothesis testing, error exponents relate to the probabilities of making errors in decisions regarding the null and alternative hypotheses. These exponents help quantify how the likelihood of error decreases as the sample size increases or as other conditions are optimized.
Everything is a file 1970-01-01
"Everything is a file" is a concept in Unix and Unix-like operating systems (like Linux) that treats all types of data and resources as files. This philosophy simplifies the way users and applications interact with different components of the system, allowing for a consistent interface for input/output operations.
Exformation 1970-01-01
Exformation is a term coined by the Danish computer scientist and philosopher Peter Gärdenfors in the context of the philosophy of information. It refers to the information that is not included when a certain message is transmitted, essentially serving as the "background knowledge" or context necessary for the recipient to understand the message fully. In other words, exformation is the implicit information that is assumed or requires shared understanding between the communicator and the audience.
Fano's inequality 1970-01-01
Fano's inequality is a result in information theory that provides a lower bound on the probability of error in estimating a message based on observed data. It quantifies the relationship between the uncertainty of a random variable and the minimal probability of making an incorrect estimation of that variable when provided with some information. More formally, consider a random variable \( X \) with \( n \) possible outcomes and another random variable \( Y \), which represents the "guess" or estimation of \( X \).
Fisher information 1970-01-01
Fisher information is a fundamental concept in statistics that quantifies the amount of information that an observable random variable carries about an unknown parameter of a statistical model. It is particularly relevant in the context of estimation theory and is used to evaluate the efficiency of estimators.
Formation matrix 1970-01-01
The term "formation matrix" can refer to different concepts depending on the context in which it is used. Here are a few interpretations: 1. **Mathematics and Linear Algebra**: In a mathematical context, a formation matrix can refer to a matrix that represents various types of transformations or formations in geometric or algebraic problems. For example, a formation matrix could be used to describe the position of points in a geometric figure or the relationship between different vectors.
Frank Benford 1970-01-01
Frank Benford, an American physicist and statistician, is best known for Benford's Law, which states that in many naturally occurring datasets, the leading digit is more likely to be a small number. Specifically, about 30% of the numbers in such sets will have "1" as the first digit, while smaller percentages will appear as the leading digits subsequently, decreasing all the way down to about 4.6% for "9".
Fungible information 1970-01-01
Fungible information refers to data or information that can be easily exchanged or replaced by other similar types of information without losing its value or utility. The term "fungible" originates from economics, where it describes goods or assets that can be interchanged with one another, such as currency (e.g., a $10 bill can be exchanged for another $10 bill). In the context of information, fungibility implies that certain pieces of data can be substituted for one another.
Generalized entropy index 1970-01-01
The Generalized Entropy Index (GEI) is a class of measures used in economics and social sciences to quantify income inequality within a population. It is based on the concept of entropy from information theory, which relates to the distribution of income among individuals or groups.
Gibbs' inequality 1970-01-01
Glossary of quantum computing 1970-01-01
A glossary of quantum computing is a compilation of terms and concepts commonly used in the field of quantum computing. Here are some key terms and their definitions: 1. **Quantum Bit (Qubit)**: The basic unit of quantum information, analogous to a classical bit, which can exist in a state of 0, 1, or both simultaneously due to superposition.
Grammar-based code 1970-01-01
Grammar-based code generally refers to programming strategies or methodologies that utilize formal grammar to structure and generate code. This can include various areas, such as: 1. **Parser Generation**: In software development, especially in compilers and interpreters, grammars (like context-free grammars) are used to define the syntax of a programming language. Tools like ANTLR or yacc can take grammar definitions and generate the corresponding parser code.