# Influence of different initial values on convergence order（in time)

**URL:** https://community.freefem.org/t/influence-of-different-initial-values-on-convergence-order-in-time/1414
**Category:** General Discussion
**Created:** [January 6, 2022, 11:02am UTC](https://community.freefem.org/t/influence-of-different-initial-values-on-convergence-order-in-time/1414 "2022-01-06T11:02:11Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Qianrui](https://avatars.discourse-cdn.com/v4/letter/q/9fc348/32.png) [@Qianrui](https://community.freefem.org/u/Qianrui)
#### Post date: [January 6, 2022, 11:02am UTC](https://community.freefem.org/t/influence-of-different-initial-values-on-convergence-order-in-time/1414/1 "2022-01-06T11:02:12Z")

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In the numerical simulation, two different initial values are selected. Using the first initial value, the convergence order can reach the second order（in time) in theory, but the other initial value has only one order（in time) and loses the order.Why?