# What is the basic integrator method of order 2 in Kahanli6()?

**URL:** <https://discourse.julialang.org/t/what-is-the-basic-integrator-method-of-order-2-in-kahanli6/117516>\
**Category:** New to Julia\
**Tags:** question\
**Created:** [July 26, 2024, 2:34pm UTC](https://discourse.julialang.org/t/what-is-the-basic-integrator-method-of-order-2-in-kahanli6/117516 "2024-07-26T14:34:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![wjliu](https://avatars.discourse-cdn.com/v4/letter/w/ce7236/32.png) [@wjliu](https://discourse.julialang.org/u/wjliu)\
**Post date:** [July 26, 2024, 2:34pm UTC](https://discourse.julialang.org/t/what-is-the-basic-integrator-method-of-order-2-in-kahanli6/117516/1 "2024-07-26T14:34:42Z")

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I have read the reference of symplectic integrator Kahanli6(), that is, ‘‘Composition constants for raising the orders of unconventional schemes for ordinary differential equations’’. As far as I know, if a symmetric one-step method of order 2 is given, I can compose it to obtain higher order methods, such as Kahanli6(). So I’m curious what basic method is used, when Kahanli6() is implemented in Julia.