Rmarkdown stop generating after a paragraph - r

Question

So my problem is that after a specific paragraph Rmarkdown doesn't generating the rest of the code and I don't know why. Note that if I delete that paragraph the program will render untill the next text paragraph and then do the same thing.
Here is a minimal markdown example with the problematic paragraph. The code block and text after the code block do not show up in the PDF.
---
title: "Proiect Regresie"
author: "Andrei Alexandru; grupa 322"
output: pdf_document
---
# Estimarea parametrilor
Considerăm modelul de regresie liniară simplă $y=\beta_{0}+\beta_{1}x +\varepsilon$ (unde x venitul provenit din vanzarile in America de Nord iar
y venitul provenit din vanzarile la nivel mondial, $\varepsilon$ este repartizat normal de medie 0 și varianță sigma p\u atrat. Estimatorii parametrilor $\beta_{0}$ \c si $\beta_{1}$ ob\c tinu\c ti prin metoda celor mai mici pătrate sunt calcula\c ti \^in R.
```{r}
mtcars
```
Some more text.

Answer 1

Apparently, the special characters (\c, etc.) are causing this problem. You need to specify the language using babel. Since it is a LaTeX package, you need to put it in header-includes in YAML.
Here are two examples of the changes you need to do:
\c si needs to be rewritten \c{s}i
ob\c tinu\c ti needs to be rewritten ob\c{t}inu\c{t}i
However, I can't figure out why using \^i or \^{i} does not work.
Full example:
---
title: "Proiect Regresie"
author: "Andrei Alexandru; grupa 322"
output: pdf_document
header-includes:
- \usepackage[romanian]{babel}
---
# Estimarea parametrilor
Considerăm modelul de regresie liniară simplă $y=\beta_{0}+\beta_{1}x +\varepsilon$ (unde x venitul provenit din vanzarile in America de Nord iar
y venitul provenit din vanzarile la nivel mondial, $\varepsilon$ este repartizat normal de medie 0 și varianță sigma p\u{a}trat. Estimatorii parametrilor $\beta_{0}$ \c{s}i $\beta_{1}$ ob\c{t}inu\c{t}i prin metoda celor mai mici pătrate sunt calcula\c{t}i \^{i}n R.
```{r}
mtcars
```
Some more text.