RE meaning in Maths ?

Answer: What is Regular Expression mean?

A regular expression (shortened as regex or regexp; also referred to as rational expression) is a sequence of characters that specifies a search pattern. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. It is a technique developed in theoretical computer science and formal language theory.

The concept of regular expressions began in the 1950s, when the American mathematician Stephen Cole Kleene formalized the description of a regular language. They came into common use with Unix text-processing utilities. Different syntaxes for writing regular expressions have existed since the 1980s, one being the POSIX standard and another, widely used, being the Perl syntax.

Regular expressions are used in search engines, search and replace dialogs of word processors and text editors, in text processing utilities such as sed and AWK and in lexical analysis. Many programming languages provide regex capabilities either built-in or via libraries, as it has uses in many situations.

reference

Full Form	Category
Release Engineering	Academic & Science
Requirements Engineering	Academic & Science
Research Engineering	Academic & Science
ROSAT (ROentgen SATellite) EUV (Extreme Ultra-Violet)	Academic & Science
Reverse Engineering	Academic & Science
Retained Earnings	Accounts and Finance
Revised Estimate	Accounts and Finance
Revised Estimates	Banking
Responding Entry	Banking
Relative Efficiency	Business
Reins Everest Holdings, Inc.	Business
Rosen Electronics	Business
Reefer	Business
Rock Energy Incorporated	Business
Room Essentials	Business
Rare Earth	Chemistry
Rhenium	Chemistry
Religious Education	Community
Runic Era	Community
Research And Education	Community
Respect the Elders	Community
Recreational Education	Community
Regular Education	Community
Re-Edition	Community
Revised	Community
Real and Equal	Computer Assembly Language
Réunion	Country Names
Reclusive Entity	Database Management
Renewable Energy	Electronics
Reunion	General
Rockstar Extraordinaire	General
Right End	General
Red Eye	General
regarding (not an acronym)	General
Revenue Expenditure	General
Risk Exposure	General
Range Extension	General
Reasoning Engine	General
Recording End	General
RAID Edition	General
Read Execute	General
Response Element	General
Repeat Elements	General
Reverted Epithelial	General
Reference Electrode	General
Runtime Environment	General
The Retail Environment	General
Rational Effect	General
The Regular Expresion	General
Reduced Energy	Governmental
Recycling Equipment	Governmental
Renovación Español	Governmental
Re-Election	Governmental
Resident Evil	Governmental
Rotary Engine	Governmental
Rear Engine	Governmental
Rear Entry	Governmental
REWARI	Indian Railway Station
Railway Employee Staff on Duty for the train	Indian Railways
Reggio nell'Emilia (Provence)	International
Royal Engraver	Jobs
Resident Engineer	Jobs
Reproductive Endocrinologist	Jobs
Radiological Engineer	Jobs
Regular Expression	Maths
Random Entry	Maths
Retrograde Ejaculation	Medical
Rolandic Epilepsy	Medical
Rear End	Medical
Reproductive Endocrinology	Medical
Re-engined	Military and Defence
Reference	Military and Defence
Rear Echelon	Military and Defence
Realtor	Real Estate
Real Estate	Real Estate
Relco	Regional
Reunion Island	Regional
Russian English	Regional
Repeat Every	Softwares
Relational Engine	Softwares
Earth Radii	Space Science
Responsible Engineer	Space Science
Racing Eagles	Sports
Russian Exchange	Stock Exchange