The smooth minimal genera for ξ∈H2(ℂP2 # n ℂP2, Z) are determined completely when n≤9 and 0>ξ2>-16. In particular, we find that ξ is represented by an embedded 2-sphere when 0>ξ2>-n-7 and n≤9.
Bibliographical noteFunding Information:
✩ The first author is partially supported by the 973 programe of P. R. China, the second author is partially supported by NSF grant DMS 9975469. * Corresponding author. E-mail addresses: firstname.lastname@example.org (B.-H. Li), email@example.com (T.-J. Li).
- Minimal genus
- Negative square