# Lyapunov spectrum

**URL:** <https://discourse.julialang.org/t/lyapunov-spectrum/41281>\
**Category:** General Usage\
**Created:** [June 12, 2020, 4:45pm UTC](https://discourse.julialang.org/t/lyapunov-spectrum/41281 "2020-06-12T16:45:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![AhmedAlreweny](https://avatars.discourse-cdn.com/v4/letter/a/db5fbb/32.png) [@AhmedAlreweny](https://discourse.julialang.org/u/AhmedAlreweny)\
**Post date:** [June 12, 2020, 4:45pm UTC](https://discourse.julialang.org/t/lyapunov-spectrum/41281/1 "2020-06-12T16:45:16Z")

</div>

I have a bit of confusion using the function

```julia
lyapunovs(ds::DynamicalSystem, N [, k::Int | Q0]; kwargs...) -> λs

```

in [ChaosTools.lyapunovs](https://juliadynamics.github.io/DynamicalSystems.jl/latest/chaos/lyapunovs/#ChaosTools.lyapunovs). I am not sure if the second argument `N` can be seen as the number of time steps, or it has another meanning.