This is a sample of my dataset:

Code:

```
dolar selic barril diesel ipca
data
2012-01-02 1.7376 0.039270 193.79 2.040 0.47
2012-01-03 1.7152 0.039270 210.87 2.042 0.26
2012-01-04 1.7152 0.039270 210.87 2.042 0.26
2012-01-05...
```

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The compound below is fexofenadine and the only chirality center, as identified by the textbook is, the one circled in red.

I don't understand why the carbonyl carbon is not a chiral center too. Isn't it attached to a

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I need to calculate the integral numerically

`NIntegrate[ StruveH[0, Sqrt[r1^2 + r2^2 - 2*r1*r2*Cos[\[Theta]]]] - BesselY[0, Sqrt[r1^2 + r2^2 - 2*r1*r2*Cos[\[Theta]]]], {\[Theta], 0, 2*Pi}, {r1, 0, 7}, {r2, 0, 7}] // Timing`

but Mathematica takes a very long time to...

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As a follow-up to my question here, can someone please explain in simple terms what is "the set of all real numbers?", $\Bbb{R}$, and which numbers it includes?

While you're at it, an explanation of...

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I have been interested recently about hyperbolic trigonometric functions and their angles.

With regular trigonometric functions, we conceptualize the angle $\theta$ in radians as the arc length $L$ in the unit circle, or the ratio of the arc length $L$ divided by the radius $r$. So...

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I don't understand the meaning but I am interested in the grammar so I can appreciate the style first-hand without turning it into a very different sentence. As a...

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