So apparently, some people* use "concave upward" and "concave downward" instead of convex and concave, and I'm not sure how I feel about that π€π
*I'm going to guess at it being a US thing, because of the word "slope", but happy to be corrected!
*I'm going to guess at it being a US thing, because of the word "slope", but happy to be corrected!
Comments
With shapes there seems to have been a switch to convex and non-convex shapes.
In this context I struggle because both concave and convex lenses are both concave up AND down.
Or if you're talking about a bowl, the inside is con... cave? While the outside is... the other
In conversation, I mentioned that I often had trouble remembering which is which. The professor said:
It's easy. "e^x is convex". It rhymes!
Concave up > slopes go up
Concave down > slopes go down
Makes sense to me, never had an issues with S getting it.
How would you say this expression?
x-y<5
I'm doing a curriculum review and a chunk of our team is in the UK.
The alt-text reads "x minus y is lesser than 5"
I would say "x minus y is less than 5"
Leave convex for the physics people where objects have an inside and outside and it actually makes sense. Or polygons....
We also use it to determine a point of inflection, but our specification calls it concave and convex.
I always thought it was easier to remember than concave/convex, but confusion arises later when convex is used to mean βthe curve is under the chordβ
Further maths differences are wild though.