9 ms·

Hi folks, A small note on what we don't support yet: no cube roots, no nth roots either square root's top line must be a single line (make it wide enough up

by gpakosz 15y ago

Hi folks, A small note on what we don't support yet: no cube roots, no nth roots either square root's top line must be a single line (make it wide enough up front) no matrices no system of equations no corrections, no scratch out (use top left undo/redo arrows) leave enough space between integral/summation symbols and main expression for better accuracy LaTeX output pleases MathJax as much as possible (thank you guys for your lovely rendering library) Hope that helps, Thank you for trying it out. PS: MathML seems to get little attention, why is it so? --- LIST OF SUPPORTED SYMBOLS (encoded in UTF-8) --- Letters a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Digits 0 1 2 3 4 5 6 7 8 9 Maths symbols € $ £ ¥ ₩ ¢ ( ) < > [ ] { } ! # % & ? @ / \ | ∥ © ∂∅ ∇ ∞ ℂ ℕ ℚ ℝ ℤ + - ± × ÷ * ∘ · = ' , . : ; _ ← ↑ → ↓ ↔ ↕ ↖ ↗ ↘ ↙ ⇐ ⇑ ⇒ ⇓ ⇔ ⇕ ∀ ∃ ∄ ∈ ∉ ∋ ∌ ∩ ∪ ⊂ ⊃ ⊄ ⊅ ∼ ≃ ≠ ≡ ≢ ≤ ≥ ≪ ≫ ∝ ∠ ∏ ∑ ∫∮∧ √ Greek symbols Γ Δ Ω α β γ δ ε η θ λ ν π ρ σ τ φ χ ψ ω ϕ µ International convention units (with cursive support) km hm dam dm cm mm µm ha hl dal dl cl ml µl kg hg dag dg cg mg µg ms µs GHz MHz kHz Hz Other mathematical terms (with cursive support) sin cos tan sinh cosh tanh arcsin arccos arctan cot coth min max arg argmin argmax inf sup lim liminf limsup ln log dx dy dz dt

robertskmiles 15y ago
It doesn't support '⊂'. It supports 'c' and 'C', but not '⊂'. Edit: It's amazing work by the way, but distinguishing those definitely needs more training.
- gpakosz 15y ago
  Writing '⊂' alone would likely be recognized as 'c' or 'C' because the decision is based on the context. 'A ⊂ B' is unkikely going to be recognized as 'A c B' or 'A C B'
rsaarelm 15y ago
Looks like it knows it's supposed to print "sin" and "cos" in non-italic text, but not the 'd' in \int x d x. Extremely neat in any case.
- fdej 15y ago
  I've almost never seen an upright 'd' in mathematical literature, though it seems to be somewhat more common in engineering texts. Ditto for the imaginary unit 'i' and the constant 'e'. Matter of taste.
  - wnoise 15y ago
    All three are set upright in _The Princeton Companion to Mathematics_ (Gowers).
  - rsaarelm 15y ago
    Hm. Now I wonder where I got the idea that of course it's supposed to be upright. Though I have been reading the Princeton Companion book mentioned in sibling. I guess the problem is that the system drops the space between the expression and the dx, outputting the "xdx". Math text does have space before dx even if the letter is italic.
dwc 15y ago
> PS: MathML seems to get little attention, why is it so? MathML is hard to write and harder to read. The only time I pay any attention to MathML is when sites do not have TeX as an option. Others may feel differently, but this is my reason.
- radicalbyte 15y ago
  > MathML is hard to write and harder to read. That's what tooling is for. It looks like a great solution for including Math in html, only the browser support seems to suck. No Chrome or IE support without the use of a plugin.
  - dwc 15y ago
    > That's what tooling is for. I disagree. Essentially requiring tools for a supposedly human-readable markup nullifies the whole human-readable aspect. Tools such as equation editors can be a great boon, but those can be had without giving up being able to read and write the markup directly. I do think it's a shame that browser support for MathML is limited or missing. I'd much rather have direct, native MathML support than nothing. MathJax is a pretty nice way to address this for now, I think. Much better than requiring random site visitors to install a plugin.
- gpakosz 15y ago
  I somewhat expected people would use it as an input to other math software
  - alexchamberlain 15y ago
    I think enough people are used to using LaTeX that MathML was never going to catch on, as its too verbose.
Lambdanaut 15y ago
Cube roots and nth roots worked just fine for me.
- hjalle 15y ago
  You must be a real handwriting-wizard because I've tried for 10 minutes now without getting it to work! :(
xxqs 15y ago
is it a raster image recognition, or a vector/gesture recognition?
- mathieuruellan 15y ago
  vector and gesture. This demo is a use case of our SDK. The SDK needs in input strokes (array of x/y) in the order. It returns a tree of symbols. We provides tools to transform into LaTex and MathML.
  - xxqs 15y ago
    thanks, this is indeed very interesting. I gave a link at a Russian wearable computing community: http://ru-wearable.livejournal.com/107496.html http://ru-wearable.livejournal.com/107496.html
- gpakosz 15y ago
  it's online recognition we interpret the strokes (1 stroke == 1 sequence of 2D points) in other words, it doesn't work on images; but we need input from a mouse, stylus, touchscreen, inkling, anoto pen, anything that outputs sequences of x,y coordinates
  - xxqs 15y ago
    then it's rather a gesture recognition :) it would be interesting to see it on a wearable computer, taking input from some gesture input devices: accelerometers or video input with markers
deleted 15y ago
[deleted]
dgreensp 15y ago
For some reason, the first thing I tried was circle-plus, which it thought was a theta followed by a bar or a one. D'oh.
eykanal 15y ago
I was very impressed that it was able to interpret "min" with "x-2" underneath it, but if I wrote anything next to it the interpreter failed. I tried writing the "min" bit on one side and putting a very large parenthesis on the other side of the sheet, but it still didn't work. Also, it handles \overline wonderfully -- impressively differentiating between an overline and fraction -- but it has trouble with the \underline. \Underbrace isn't working so well, either. Yet another difficulty - "1 / 2" is turned into "y_2". The horizontal fraction delimiter doesn't seem to be recognized. Very impressive!
arandomJohn 15y ago
Do you have an iOS SDK? What are the licensing terms? I'd love to integrate this into some of my math games.
adimitrov 15y ago
It works splendidly with any algebra I throw at it, but it's not very much intended to handle expressions in logical calculus, is it? Case in point: http://i.imgur.com/tnuxs.png http://i.imgur.com/tnuxs.png
- JoshTriplett 15y ago
  For a bug report like this, you might want to explain exactly what LaTeX you expect that to turn into.
  - adimitrov 15y ago
    $p,q \vdash p$ — sorry, I was pretty sure it was obvious to anyone, but I guess my handwriting wasn't that good.

by gpakosz 15y ago

robertskmiles 15y ago

It doesn't support '⊂'. It supports 'c' and 'C', but not '⊂'. Edit: It's amazing work by the way, but distinguishing those definitely needs more training.

gpakosz 15y ago
Writing '⊂' alone would likely be recognized as 'c' or 'C' because the decision is based on the context. 'A ⊂ B' is unkikely going to be recognized as 'A c B' or 'A C B'

rsaarelm 15y ago

Looks like it knows it's supposed to print "sin" and "cos" in non-italic text, but not the 'd' in \int x d x. Extremely neat in any case.

fdej 15y ago
I've almost never seen an upright 'd' in mathematical literature, though it seems to be somewhat more common in engineering texts. Ditto for the imaginary unit 'i' and the constant 'e'. Matter of taste.
- wnoise 15y ago
  All three are set upright in _The Princeton Companion to Mathematics_ (Gowers).
- rsaarelm 15y ago
  Hm. Now I wonder where I got the idea that of course it's supposed to be upright. Though I have been reading the Princeton Companion book mentioned in sibling. I guess the problem is that the system drops the space between the expression and the dx, outputting the "xdx". Math text does have space before dx even if the letter is italic.

dwc 15y ago

> PS: MathML seems to get little attention, why is it so? MathML is hard to write and harder to read. The only time I pay any attention to MathML is when sites do not have TeX as an option. Others may feel differently, but this is my reason.

radicalbyte 15y ago
> MathML is hard to write and harder to read. That's what tooling is for. It looks like a great solution for including Math in html, only the browser support seems to suck. No Chrome or IE support without the use of a plugin.
- dwc 15y ago
  > That's what tooling is for. I disagree. Essentially requiring tools for a supposedly human-readable markup nullifies the whole human-readable aspect. Tools such as equation editors can be a great boon, but those can be had without giving up being able to read and write the markup directly. I do think it's a shame that browser support for MathML is limited or missing. I'd much rather have direct, native MathML support than nothing. MathJax is a pretty nice way to address this for now, I think. Much better than requiring random site visitors to install a plugin.
gpakosz 15y ago
I somewhat expected people would use it as an input to other math software
- alexchamberlain 15y ago
  I think enough people are used to using LaTeX that MathML was never going to catch on, as its too verbose.

Lambdanaut 15y ago

Cube roots and nth roots worked just fine for me.

hjalle 15y ago
You must be a real handwriting-wizard because I've tried for 10 minutes now without getting it to work! :(

xxqs 15y ago

is it a raster image recognition, or a vector/gesture recognition?

mathieuruellan 15y ago
vector and gesture. This demo is a use case of our SDK. The SDK needs in input strokes (array of x/y) in the order. It returns a tree of symbols. We provides tools to transform into LaTex and MathML.
- xxqs 15y ago
  thanks, this is indeed very interesting. I gave a link at a Russian wearable computing community: http://ru-wearable.livejournal.com/107496.html http://ru-wearable.livejournal.com/107496.html
gpakosz 15y ago
it's online recognition we interpret the strokes (1 stroke == 1 sequence of 2D points) in other words, it doesn't work on images; but we need input from a mouse, stylus, touchscreen, inkling, anoto pen, anything that outputs sequences of x,y coordinates
- xxqs 15y ago
  then it's rather a gesture recognition :) it would be interesting to see it on a wearable computer, taking input from some gesture input devices: accelerometers or video input with markers

deleted 15y ago

[deleted]

dgreensp 15y ago

For some reason, the first thing I tried was circle-plus, which it thought was a theta followed by a bar or a one. D'oh.

eykanal 15y ago

I was very impressed that it was able to interpret "min" with "x-2" underneath it, but if I wrote anything next to it the interpreter failed. I tried writing the "min" bit on one side and putting a very large parenthesis on the other side of the sheet, but it still didn't work. Also, it handles \overline wonderfully -- impressively differentiating between an overline and fraction -- but it has trouble with the \underline. \Underbrace isn't working so well, either. Yet another difficulty - "1 / 2" is turned into "y_2". The horizontal fraction delimiter doesn't seem to be recognized. Very impressive!

arandomJohn 15y ago

Do you have an iOS SDK? What are the licensing terms? I'd love to integrate this into some of my math games.

adimitrov 15y ago

It works splendidly with any algebra I throw at it, but it's not very much intended to handle expressions in logical calculus, is it? Case in point: http://i.imgur.com/tnuxs.png http://i.imgur.com/tnuxs.png

JoshTriplett 15y ago
For a bug report like this, you might want to explain exactly what LaTeX you expect that to turn into.
- adimitrov 15y ago
  $p,q \vdash p$ — sorry, I was pretty sure it was obvious to anyone, but I guess my handwriting wasn't that good.