Back to the Abstract

	1 Introduction
	2 Numerical model
	3 Quasi-static and dynamic evolution of twisting flux tubes
	4 Relaxation
	5 Sigmoidal shape
	6 Conclusions
	Appendix A: The modified two-step Lax-Wendroff method
	Appendix B: Treatment of the numerical parameters
	References

	List of tables
	List of figures