Well! I can explain it (just ... jumping out of one of the hyper-operation ... boxes, such as y = a [s] b
)!
As you know, I joined ... in the Beginning (2007, I presume) and I was then identified as a 'Junior Fellow'. After an amusing exchange of views with the Admonistrator (Hi, Bo!), during which I tried to object about the correctess of one of the words used in identifying me (born in 1935!), Bo decided to change both of them, 'motu proprio' and ... without worning. So, ... I became just a 'member'! Correct, amusing, but ... strange and peculiar.
Marcus Porcius Cato was able to learn Greek at the age of 80. Perhaps, I will be finally able to learn the correct use of the TeX slashes before the end of 2015.
Actually, I am just a fellow and I am very proud of that. In the recent past, I had very fruitful exchange of views with Bo and other 'Fellows' and 'Visitors', concerning matters between zeration and tetration, with some hints to ... infinity (omegation). Zeration was (and still is) ... borderline and tricky. Nevertheless, I recently assisted at the birth of 'Tropical Mathematics', which has almost the same age of my Forum fellowship and may carry out new ideas for ... understanding zeration (I am joking, Bo, ... ma non troppo!).
If you have such powers, please help me in becoming a standard 'Fellow'! Thank you very much in advance
!
GFR