PGL(2, 11) and PSL(2, 11)

A complete span of H(4, 4) admitting PSL2(11) and related structures

We construct a complete 11–span of H(4, 4) admitting the group PSL2(11). This span turns out to be associated with the unique Hadamard design H11 and the so-called Petersen design.

X(11) and M 11

In this paper, we prove that the modular curve X(11) over a field of characteristic 3 admits the Mathieu group M 11 as an automorphism group. We also examine some aspects of the geometry of the curve X(11) in characteristic 3. In particular, we show that every point of the curve is a point of inflection, the curve has 110 hyperflexes and there are no inflectional triangles and 144 inflectional ...

A11 11..11

The presence of paranoid thoughts is not exclusive to clinical disorder; recent data suggest that their prevalence follows an exponential-shaped curve, with many people experiencing a few such thoughts, while a few people experience many such thoughts. Wong et al (pp. 221–229) found that this exponential curve was also evident in their assessment of paranoid thoughts in children, but the freque...

A11 11..11

Previous self-harm is a major predictor of non-fatal repetition and subsequent suicide. Owens et al (pp. 193–199), in a systematic review, estimate the rates of these outcomes following self-harm and find the link between self-harm and suicide to be a strong one. Non-fatal repetition occurred in around 15% of people in the year after an attempt, with up to 2% committing suicide over this time. ...

Computational Methods 11 - 04 and 11 Yxx