On complexity of realisation of a~class of almost symmetric functions by formulas of depth~3
Diskretnaya Matematika, Tome 20 (2008) no. 1, pp. 120-130

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We consider the class of almost symmetric Boolean functions. For any function of this class, the values on all tiers except the second one coincide with the values of a monotone symmetric function with threshold 3. The values on the second tier are arbitrary. We study realisation of functions of this class by $\\vee\$- formulas over the basis $\{\,\vee\}$. We obtain a sharp bound for the minimum complexity of the functions of this class (the function of minimum complexity is explicitly written out) and an asymptotic estimate of complexity of a monotone symmetric function with threshold 3 which is maximal in order of complexity in the class under consideration.
@article{DM_2008_20_1_a10,
     author = {S. E. Cherukhina},
     title = {On complexity of realisation of a~class of almost symmetric functions by formulas of depth~3},
     journal = {Diskretnaya Matematika},
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     publisher = {mathdoc},
     volume = {20},
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     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2008_20_1_a10/}
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S. E. Cherukhina. On complexity of realisation of a~class of almost symmetric functions by formulas of depth~3. Diskretnaya Matematika, Tome 20 (2008) no. 1, pp. 120-130. http://geodesic.mathdoc.fr/item/DM_2008_20_1_a10/