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This site undermines its own intent of providing a friendly and accessible introduction to calculus through poor and erroneous grammar. An editor could make it

This site undermines its own intent of providing a friendly and accessible introduction to calculus through poor and erroneous grammar. An editor could make it very useful. Some examples: “OK, but how does calculus models change?” error: subject-verb number agreement. Try “model”. “The fundamental idea of calculus is to study change by studying ‘instantaneous’ change, by which we mean changes over tiny intervals of time.” So, a change is a changes? Stay with the singular: “by which we mean a change over a tiny interval of time.” “It turns out that such [tiny] changes tend to be lots simpler than changes over finite intervals of time.” Now we have a logical problem. Isn’t the set of tiny intervals of time a subset of finite intervals of time? In ordinary usage, “tiny” is finite, surely; a tiny thing is not infinite. So how can a tiny-time change be simpler than a finite-time change, when it is itself a finite-time change? Errors of this sort lost my faith early on. I hope they’re corrected, because the promise of the article is appealing.

bardworx 7y ago
I’m my opinion, your comment is very self serving and reminds me of a quote from Theodore Roosevelt: “It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat.” If you really cared about the subject you could have sent the creator/department a message with your constructive criticism. Instead, you posted on the form how a few errors invalidates the entire work that took significant amount of time.

bardworx 7y ago

I’m my opinion, your comment is very self serving and reminds me of a quote from Theodore Roosevelt: “It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat.” If you really cared about the subject you could have sent the creator/department a message with your constructive criticism. Instead, you posted on the form how a few errors invalidates the entire work that took significant amount of time.