Trace

Trace may refer to:

;Mathematics, computing and electronics:
* Trace (linear algebra) of a square matrix or a linear transformation
* Trace class, a certain set of operators in a Hilbert space
* Trace operator, a restriction-to-boundary operator in a Sobolev space
* Field trace in field theory
* Traces, the equivalence classes of strings of a trace monoid, studied in trace theories of concurrent computation
* Signal trace, a printed or etched wire on a printed circuit board
* Packet trace, a timestamped sequence of packets captured on a computer network with a sniffer or similar tools
* Stack trace, report of the active steps of a computer program's execution
* Software trace, a list of a computer program's past execution steps, recorded by the process of tracing

;Language
* Trace (semiology), the history carried by a sign
* Trace (linguistics), a syntactic placeholder resulting from a transformation
* TRACE (psycholinguistics), a psycholinguistic model of speech perception
* Trace (Deconstruction), a concept in Derridian Deconstruction

;Physical sciences
* Trace radioisotope, an element that is found in small quantities because it undergoes radioactive decay
* Trace evidence, material found at a crime scene
* Trace element, in geochemistry, an element which composes less than 0.1% of a sample
* TRACE (Transition Region and Coronal Explorer), a NASA satellite
* Trace fossil, fossil record of biological activity

;Other
* "Trace" (album), a 1995 album by alt-country band Son Volt
* Trace Adkins, an American country music singer
* Tracing (law), to assert a proprietary remedy against a third party asset
* Trace (tack), one of two or more straps, ropes, or chains by which a vehicle is drawn by a harnessed draught animal
* TrAce Online Writing Centre, a community for writers working online
* "Trace" (novel), by Patricia Cornwell
* Trace, another name for Portgas D. Ace, a fictional character in the manga "One Piece"
* Trace, a fictional character in the game "Metroid Prime Hunters"
* Trace (band), a Dutch progressive rock band
* Trace (artist), a UK drum and bass artist
* "Trace" (magazine), British hip-hop magazine

;Neurosciences and behavior sciences
* Trace, a type of eyeblink conditioning

ee also

*DTrace
*tracing