%0 Journal Article %T Towards Homological Projective duality for S^2 P^3 and S^2 P^4 %A Shinobu Hosono %A Hiromichi Takagi %J Mathematics %D 2015 %I arXiv %X We provide homological foundations to establish conjectural homological projective dualities between 1) S^2 P^3 and the double cover of the projective 9-space branched along the symmetric determinantal quartic, and 2) S^2 P^4 and the double cover of the symmetric determinantal quintic in the projective 14-space branched along the symmetric determinantal locus of rank at most 3. %U http://arxiv.org/abs/1508.01997v1