Algophobia Algophobia Algophobia is a phobia of pain - an abnormal and persistent fear of pain that is far more powerful than that of a normal person. Algophobia is much more common in elderly people. It can be treated with behavioral therapy and anti-anxiety medication. The term comes from the , "álgos", "pain" and , "phóbos", "fear". According to Sabino Metta, a behavioral psychologist, the phobic reaction is a learned behavior. A common example of this would be an elderly person who hears about all of their friends suffering from various ailments and pains. This person will begin to anticipate the
Persistent homology Persistent homology Persistent homology is a method for computing topological features of a space at different spatial resolutions. More persistent features are detected over a wide range of spatial scales and are deemed more likely to represent true features of the underlying space rather than artifacts of sampling, noise, or particular choice of parameters. To find the persistent homology of a space, the space must first be represented as a simplicial complex. A distance function on the underlying space corresponds to a filtration of the simplicial complex, that is a nested sequence of increasing subsets. Formally, consider a real-valued function