---
# System prepended metadata

title: Untitled

---

## Flowchart
* Euclide GCD
```mermaid
graph TB
    start([start])
    stop([stop])
    read([read a,b])
    if{a = 0}
    return_b([return b])
    return_gcd[a = b % a, b = a]
    start --> read --> if
    if --> |yes| return_b --> stop
    if --> |no| return_gcd --> read 
```

* Quadratic Equation
```mermaid
graph TB
    stop([stop])
    start([start]) --> ifa{a == 0}
    ifa --> |yes| ifb{b == 0}
    ifb --> |no| return_cb[x = -c/b] --> stop
    ifb --> |yes| return_noslu([No slution]) --> stop
    ifa --> |no| delta[delta = b^2 - 4ac] --> ifdelta_sm{delta < 0}
    ifdelta_sm --> |yes| return_noslu
    ifdelta_sm --> |no| ifdelta_e{delta = 0}
    ifdelta_e --> |yes| return_1["x = -b / (2*a)"] --> stop
    ifdelta_e --> |no| return_2nd["x1 = (-b + sqrt(delta)) / (2*a)<br>x2 = (-b - sqrt (delta)) / (2*a)"] --> stop 
    
```

## Sequence diagram
```mermaid
graph LR
A[Zip file]-->B[\"R (abc) functions\"]
A[Zip file]-->C[manual<br>for R<br>functions]
A[Zip file]-->D[vingettes]
D[vingettes]-->E[data]
D[vingettes]-->F[figures]
D[vingettes]-->G((R<br>markdown<br>file))
A[Zip file]-->H((README<br>file))


```