## Volume 123,
Numbers 1-3,
December 1993

- Y. P. Liu:

**Preface.
**1

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- Wenchang Chu, Leetsch C. Hsu:

**On some classes of inverse series relations and their applications.
**3-15

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- Zongduo Dai, Xuning Feng, Mulan Liu, Zhe-xian Wan:

**Nonlinear feedforward sequences of m-sequences I.
**17-34

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- Feng Ming Dong, Yanpei Liu:

**Counting rooted near-triangulations on the sphere.
**35-45

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- Zhicheng Gao:

**The number of degree restricted maps on general surfaces.
**47-63

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- Yuan Hong:

**Bounds of eigenvalues of graphs.
**65-74

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- Qiao Li, Jiayu Shao:

**The index set problem for Boolean (or nonnegative) matrices.
**75-92

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- Yanpei Liu:

**On functional equations arising from map enumerations.
**93-109

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- Feng Shi, Weixuan Li:

**The density of a maximum minimal cut in the subset lattice of a finite set is almost one.
**111-115

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- Shou-Tian Ting, Shu-Yu Zhao:

**The general Steiner problem in rectangular crisscross space.
**117-120

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- Gui-Zhang Tu:

**A combinatorial formula relating to Hirota's bilinear equations.
**121-129

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- Zhe-xian Wan:

**Anzahl theorems in finite singular symplectic, unitary and orthogonal geometries.
**131-150

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- Wan-Di Wei, Shuhong Gao, Benfu Yang:

**Cyclic near difference sets of type 1.
**151-177

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- Wan-Di Wei, Ju-Yong Xu:

**Cycle index of direct product of permutation groups and number of equivalence classes of subsets of Z**_{v}.
179-188

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- Lie Zhu:

**Some recent developments on BIBDs and related designs.
**189-214

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Copyright © Sat May 16 23:56:55 2009
by Michael Ley (ley@uni-trier.de)