## TRACE

### Trace

In linear algebra, the trace of an n-by-n square matrix A is defined to be the sum of the elements on the main diagonal of A, i.e.,

The above text is a snippet from Wikipedia: Trace (linear algebra)

### TRACE

TRACE was a NASA space telescope designed to investigate the connections between fine-scale magnetic fields and the associated plasma structures on the Sun by providing high resolution images and observation of the solar photosphere and transition region to the corona. A main focus of the TRACE instrument is the fine structure of coronal loops low in the solar atmosphere. TRACE is a SMEX or SMall EXplorer mission, launched in 1998 and obtaining its last science image in 2010.

The above text is a snippet from Wikipedia: TRACE

### trace

#### Noun

1. An act of tracing.
2. A mark left as a sign of passage of a person or animal.
3. A very small amount.
4. An electric current-carrying conductive pathway on a printed circuit board.
5. An informal road or prominent path in an arid area.
6. One of two straps, chains, or ropes of a harness, extending from the collar or breastplate to a whippletree attached to a vehicle or thing to be drawn; a tug.
7. The ground plan of a work or works.
8. The intersection of a plane of projection, or an original plane, with a coordinate plane.
9. The sum of the diagonal elements of a square matrix.

#### Verb

1. To follow the trail of.
2. To follow the history of.
3. To draw or sketch lightly or with care.
He carefully traced the outlines of the old building before him.
4. To copy onto a sheet of paper superimposed over the original, by drawing over its lines.
5. To copy; to imitate.
6. To walk; to go; to travel.
7. To walk over; to pass through; to traverse.

The above text is a snippet from Wiktionary: trace