of free subgroups in $h$. one can conjecture that if every f.g. free subgroup in $h$ is recursively distorted then the freedom problem is decidable. one can also conjecture that hardness of the freedom problem correlates to the degree of distortion of free subgroups....
high, the tallest in asia and third tallest in the world. it faces the bund across the huangpu river. when viewed from the bund, the tower and the nanpu and yangpu bridges create a vivid imagery known as "two dragons playing with a pearl." the sphere at the top has a diameter of meters and is meters...
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machinery industry. factory area kaifeng instrument co., ltd. is factory covers over square meters. established there are more than employees, including engineers and technicians. kaifeng instrument company profile kaifeng instrument co., ltd. the national water large flow rate metering station, the...
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