| Content of Issue 12 DOI: 10.3217/jucs-011-12
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| Constructivity, Computability, and Logic A Collection of Papers in Honour of the 60th Birthday of Douglas Bridges
 | C.S. Calude, H. Ishihara | 1863 | 
| Constructive Suprema | M.A. Baroni | 1865 | 
| Constructive Equivalents of the Uniform Continuity Theorem | J. Berger | 1878 | 
| Computability of the Spectrum of Self-Adjoint Operators | V. Brattka, R. Dillhage | 1884 | 
| Algorithmic Irreducibility in a Cellular Automata Universe | G. Chaitin | 1901 | 
| Constructive Analysis of Iterated Rational Functions | J. Clark | 1904 | 
| Formal Topology and Constructive Mathematics: the Gelfand and Stone-Yosida Representation Theorems | T. Coquand, B. Spitters | 1932 | 
| Axiomatic Classes of Intuitionistic Models | R. Goldblatt | 1945 | 
| On Firmness of the State Space and Positive Elements of a Banach Algebra | R.S. Havea | 1963 | 
| Nonrandom Sequences between Random Sequences | P. Hertling | 1970 | 
| Permutability of Rules for Linear Lattices | S. Negri | 1986 | 
| Quotient Spaces and Coequalisers in Formal Topology | E. Palmgren | 1996 | 
| Constructive Set Theory and Brouwerian Principles | M. Rathjen | 2008 | 
| Constructing Programs or Processes | S. Reeves, D. Streader | 2034 | 
| Constructive Aspects of Markov Chains | F. Richman | 2046 | 
| On the Meaning of Positivity Relations for Regular Formal Spaces | G. Sambin, G. Trentinaglia | 2056 | 
| Functional Dependencies with Counting on Trees | K.-D. Schewe | 2063 | 
| What is Continuity, Constructively? | P. Schuster | 2076 | 
| A Direct Proof of the Equivalence between Brouwer's Fan Theorem and König's Lemma with a Uniqueness Hypothesis | H. Schwichtenberg | 2086 | 
| Constructive Results on Operator Algebras | B. Spitters | 2096 | 
| Hausdorff Measure and Lukasiewicz Languages | L. Staiger | 2114 | 
| New Bounds for Positive Roots of Polynomials | D. Ştefănescu | 2125 | 
| How the Mathematical Objects Determine the Mathematical Principles | D. van Dalen | 2132 | 
| Perhaps the Intermediate Value Theorem | W. Veldman | 2142 | 
| On Complements of Sets and   the Efremovič Condition in Pre-apartness Spaces | L.S. Vîţă | 2159 | 
| A Constructive Approach to Sylvester's Conjecture | J. von Plato | 2165 | 
| Sequential Computability of a Function. Effective Fine Space and Limiting Recursion | M. Yasugi, Y. Tsujii, T. Mori | 2179 |