```
def arithmetic_progression(lst):
difference = lst[1] - lst[0]
for i in range(len(lst) - 1):
if not (difference == lst[i + 1] - lst[i]):
return False
return True
```

```
def arithmetic_progression(lst):
difference = lst[1] - lst[0]
for i in range(len(lst) - 1):
if not (difference == lst[i + 1] - lst[i]):
return False
return True
```