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- etimologia
Cosa (chi) è ones complement - definizione
SEROLOGIC BLOOD TEST BASED ON INACTIVATION OF COMPLEMENT BY THE ANTIGEN-ANTIBODY COMPLEX (STAGE 1)
Complement fixation; Complement-fixation; Complement-fixation test; Complement fixation tests
ones complement
A system used in some computers to represent negative
numbers. To negate a number, each bit of the number is
inverted (zeros are replaced with ones and vice versa). This
has the consequence that there are two reperesentations for
zero, either all zeros or all ones.
...
000...00011 = +3
000...00010 = +2
000...00001 = +1
000...00000 = +0
111...11111 = -0
111...11110 = -1
111...11101 = -2
111...11100 = -3
...
Naive logic for ones complement addition might easily conclude
that -0 + 1 = +0.
The twos complement avoids this by using all ones to
represent -1.
set complement
UNARY OPERATION ON SETS: THE SET OF NON-ELEMENTS OF THE ARGUMENT SET
Set theoretic complement; Set-theoretic difference; Complement (sets); Relative complement; Set difference; Set theoretic difference; Set-theoretic complement; Absolute complement; Complementation (mathematics); Set complement; Complement set; Difference of two sets; ∖; Set minus; Absolute set complement; Difference (set theory); Set subtraction; Setminus; Set theory complement; Complement set theory; Complementary relation
<theory> The complement of set A in set U is all elements of U
which are not elements of A.
(1995-01-24)
Complement (complexity)
RELATING TO DECISION PROBLEMS AND COMPLEXITY CLASSES
Complement class
In computational complexity theory, the complement of a decision problem is the decision problem resulting from reversing the yes and no answers.. Equivalently, if we define decision problems as sets of finite strings, then the complement of this set over some fixed domain is its complement problem..
Wikipedia
Complement fixation test
The complement fixation test is an immunological medical test that can be used to detect the presence of either specific antibody or specific antigen in a patient's serum, based on whether complement fixation occurs. It was widely used to diagnose infections, particularly with microbes that are not easily detected by culture methods, and in rheumatic diseases. However, in clinical diagnostics labs it has been largely superseded by other serological methods such as ELISA and by DNA-based methods of pathogen detection, particularly PCR.
