abbr. |
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literal |
mathematical usage |
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a fortiori |
with stronger reason |
used in logic to denote an |
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to the effect that |
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because one ascertained fact exists; |
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therefore another which is |
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included in it or analogous to is |
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and is less improbable, unusual, |
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or surprising must also exist |
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a priori |
from the former |
already known/assumed |
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ad absurdum |
to absurdity |
an assumption is made in hopes of |
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obtaining a contradiction |
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[reductio ad absurdum is also used] |
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ad infinitum |
to infinity |
endlessly, infinitely |
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casus irreducibilis |
not-reducible case |
roots real but not |
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expressible via real http://planetmath.org/Radical5radicals
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cf. |
confer |
compare |
used to suggest that another |
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work might also be consulted |
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in to that |
et al. |
et alii |
and others |
used in multi-author references |
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but it is customary to include |
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all the authors in the first |
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citation and/or in the |
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bibliography |
e.g. |
exempli gratia |
for example’s sake |
for example |
ibid. |
ibidem |
in the same |
relates to the |
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immediately prior |
i.e. |
id est |
that is |
that is |
inf |
inferior, infimum
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lowest |
limit inferior; greatest lower bound |
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inter alia |
among other things |
among other things |
loc. cit. |
loco citato |
in the already mentioned |
relates to before the |
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immediately prior citation |
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[probably less frequent |
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than op. cit.] |
lb |
logarithmus binaris |
binary logarithm |
log. in base 2 |
lg |
logarithmus generalis |
general logarithm |
log. in base 10 |
ln |
logarithmus naturalis |
natural logarithm |
log. in base
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mutatis mutandis |
once changing thing to be changed |
repeat the |
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for the related case |
N.B. |
nota bene |
note well |
the following is important |
op. cit. |
opere citato |
in the work already mentioned |
relates to before the |
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immediately prior citation |
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[probably more frequent |
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than loc. cit.] |
QED |
quod erat demonstrandum |
which was to be demonstrated |
end of proof |
QEF |
quod erat faciendum |
which was to be done |
end of construction |
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regula falsi |
rule of false position |
Newton’s method |
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sine qua non |
without which it could not be |
an essential condition |
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or element; an indispensable thing |
sup |
superior, supremum
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uppermost |
limit superior, http://planetmath.org/LowestUpperBoundleast upper bound
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viz |
videlicet |
that is to say, namely |
a keynote abbreviation |