* 数式 [#d1ae150d] #ref(http://www.codecogs.com/gif.latex?z_t = \displaystyle\sum^p_{j=1}\phi_jz_{t-j}+\sigma_\epsilon\xi_t) &ref(http://www.codecogs.com/png.latex?z_t = \displaystyle\sum^p_{j=1}\phi_jz_{t-j}+\sigma_\epsilon\xi_t.gif); #ref(http://www.codecogs.com/png.latex?z_t = \displaystyle\sum^p_{j=1}\phi_jz_{t-j}+\sigma_\epsilon\xi_t.gif) ↑アドレスに半角スペースがあるのが悪いのか? &ref(http://www.codecogs.com/png.latex?z_t=\displaystyle\sum^p_{j=1}\phi_jz_{t-j}+\sigma_\epsilon\xi_t.gif); http://www.codecogs.com/png.latex?z_t=\displaystyle\sum^p_{j=1}\phi_jz_{t-j}+\sigma_\epsilon\xi_t.gif &ref(http://www.jicfus.jp/field5/jp/wp-content/uploads/2011/01/main.jpg);