Trace Class Operators

Famous quotes containing the words trace and/or class:

“Muhammad is the Messenger of God,
and those who are with him are hard
against the unbelievers, merciful
one to another. Thou seest them
bowing, prostrating, seeking bounty
from God and good pleasure. Their
mark is on their faces, the trace of
prostration....
God has promised
those of them who believe and do deeds
of righteousness forgiveness and
a mighty wage.”
—Qur’An. Victory 48:35, ed. Arthur J. Arberry (1955)

“For my own part, I had rather suffer any inconvenience from having to work occasionally in chambers and kitchen ... than witness the subservience in which the menial class is held in Europe.”
—Harriet Martineau (1802–1876)