1. Contact equivalence and unfoldings;Singularities, Bifurcations and Catastrophes;2021-06-24
2. Classification for contact equivalence;Singularities, Bifurcations and Catastrophes;2021-06-24
3. Tangent spaces;Singularities, Bifurcations and Catastrophes;2021-06-24
4. Contact equivalence;Singularities, Bifurcations and Catastrophes;2021-06-24
5. Families of maps and bifurcations;Singularities, Bifurcations and Catastrophes;2021-06-24