**Formal Languages**

Word problem for Context-sensitive language · Regular language intersection · Regular expression star freeness · Equivalence problem for regular expressions · Emptiness problem for regular expressions with intersection. · Equivalence problem for star-free regular expressions with squaring. · Covering for linear grammars · Structural equivalence for linear grammars · Equivalence problem for Regular grammars · Emptiness problem for ET0L grammars · Word problem for ET0L grammars · Tree transducer language membership problem for top down finite-state tree transducers

Read more about this topic: List Of PSPACE-complete Problems, Automata and Language Theory

### Other articles related to "formal languages, languages, language, formal":

**Formal Languages**

... In formal languages, truth functions are represented by unambiguous symbols ... These symbols are called "logical connectives", "logical operators", "propositional operators", or, in classical logic, "truth-functional connectives" ...

**Formal Languages**

... Real world tasks are formalized by programming

**languages**, which are executed on computers based on the von Neumann architecture ... Since programming

**languages**are only comfortable representations of the Turing machine any program on a von Neumann computer has the same properties and limitations as the Turing machine or its ... Consequently every programming

**language**such as CPU level machine code, assembler, or any high level programming

**language**has the same expressional power as ...

... In metalogic, 'syntax' has to do with

**formal languages**or

**formal**systems without regard to any interpretation of them, whereas, 'semantics' has to do with interpretations of

**formal languages**... than 'proof-theoretic', since it may be applied to properties of

**formal languages**without any deductive systems, as well as to

**formal**systems ...

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“Science and technology multiply around us. To an increasing extent they dictate the *languages* in which we speak and think. Either we use those *languages*, or we remain mute.”

—J.G. (James Graham)

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