"It's been a long time since" is already a negative construction, so it's probably just a special case of the general prohibition against double negatives. Shrug.

Hermit, good point.

How about doing binary (base2) arithmetic in Spanish, using just the digits 0 and 1?

Also in logic we can use the symbols 0 and 1 to represent two mutually opposite states such as on and off, or true and false? In this system the symbols . and + are used to mean AND and OR

integral de superficie = surface integral
integral de línea = line integral
integral múltiple = multiple integral
integración = integration

coordenadas polares = polar coordinates
coordenadas esféricas = spherical coordinates
coordenadas cilíndricas = cylindrical coordinates

diferenciable = differentiable
diferenciabilidad = differentiability
diferenciación = differentiation

continuidad = continuity
continuo = continuous

función derivable = differentiable function (in 1 dimension)
función diferenciable = differentiable function (in multiple dimensions)
función continua = continuous function
derivada parcial = partial derivative

conjunto = set
subconjunto = subset
intervalo = interval

dimensión = dimension
dominio = domain
rango = range

polinomio = polynomial

Why didn't this thread show when I looked under Forums/Vocabulary/Vocabulary by topic? I had to do a search on forum titles.... ???

Anyway - it occurred to me this morning (while teaching about fractions to a group of Spanish speaking students) that I don't know how fractions are worded in Spanish.

one-half two-halves
one-third two-thirds
one-fourth two-fourths three-fourths
one-fifth two-fifths three-fifths
one-sixth
one-seventh
one-eighth
one-ninth
one-tenth

etc....

Thanks!

:):):)

Thanks, Hernan! Now, when you say "etc.", I'm not sure how to generically determine the "n-th" denominator. In English, we add "-th" if it's a unique number name (seventeenth, twentieth, etc.), and if it ends with "one" through "nine", the ending is the same as that number (twenty-third, fifty-ninth, etc.) How would I determine, say, how to say "eight elevenths" or "fifteen twenty-thirds", etc.?

onceavos = elevenths
doceavos = twelfths
treceavos = thirteenths...
veinteavos = twentieths

dos quinceavos = two fifteenths
trece dieciochavos = thirteen eighteenths

I think that's how it goes, in answer to your question Lou Ann. :)

VERY helpful! Thanks!! :)

Yes, thank you Ambarina.

However, I wanted to go to the "undécimo" form, and I could not remember what is it that they are called...

Ok, Lou Ann, you are a Math teacher...

Numbers: Cardinals, ordinals is there any other?

What's "undécimo" form?

I think that most people would just say that there are cardinal and ordinal numbers. I've read somewhere about "nominal" numbers (numbers that name something like a number on a sports jersey or something like that), but I don't know how conventional that is. In a mathematics class, we talk about real numbers, rational and irrational numbers, integers, whole numbers and natural or counting numbers. Those are probably not practical or "every-day" numbers that anyone but a math teacher would use..... :p