次のようなTeXのファイルを作ったのですが、１ページ目の余白が不自然に多くなってしまうので、１ページ目の終わりで改ページしたくありません。
\\*や\samepageを使ってみたのですが症状は治りません。どうしたらここで改ページしないようにできるでしょうか？
\documentclass[a4]{article}
\usepackage{amsmath, amssymb}
\usepackage{latexsym}
\usepackage{overcite}
\usepackage{amsthm}
\begin{document}
\begin{align}
c_2(\Lambda)&=-\frac{2}{3}\{\frac{1}{0!4!}\sum_{\mu=1}^3(P_{f_{\mu}}\varphi_0, \Phi_4^{\mu})+\frac{1}{1!3!}\sum_{\mu=1}^3(P_{f_{\mu}}\varphi_1, \Phi_3^{\mu}) \notag \\
&+\frac{1}{2!2!}\sum_{\mu=1}^3(P_{f_{\mu}}\varphi_2, \Phi_2^{\mu})+\frac{1}{3!1!}\sum_{\mu=1}^3(P_{f_{\mu}}\varphi_3, \Phi_1^{\mu})+\frac{1}{4!0!}\sum_{\mu=1}^3(P_{ f_{\mu}}\varphi_4, \Phi_0^{\mu})\} \notag \\
&=-\frac{1}{36}\sum_{\mu=1}^3(d\Gamma(k_{\mu})\Omega, \Phi_4^{\mu})-\frac{1}{9}\sum_{\mu=1}^3(P_{f_{\mu}}\varphi_1, \Phi_3^{\mu}) \notag \\
&-\frac{1}{6}\sum_{\mu=1}^3(P_{f_{\mu}}\varphi_2, \Phi_2^{\mu})-\frac{1}{9}\sum_{\mu=1}^3(P_{ f_{\mu}}\varphi_3, \Phi_1^{\mu})-\frac{c_0}{36}\sum_{\mu=1}^3(\varphi_4, d\Gamma(k_{\mu})\Omega) \notag \\
&=-\frac{1}{9}\sum_{\mu=1}^3(P_{f_{\mu}}\varphi_1, \Phi_3^{\mu})-\frac{1}{6}\sum_{\mu=1}^3(P_{f_{\mu}}\varphi_2, \Phi_2^{\mu})-\frac{1}{9}\sum_{\mu=1}^3(P_{ f_{\mu}}\varphi_3, \Phi_1^{\mu}). \label{eq:c2}
\end{align}
We have
\begin{align*}
\varphi_2&=2(H_0^{-1}H_1)^2\Omega, \\
\varphi_3&=-6(H_0^{-1}H_1)^3\Omega-3E_2(H_0^{-1})^2H_1\Omega, \\
\Phi_{2}^{\mu}&=\frac{2}{m}H_0^{-1}P_{f_{\mu}}(H_0^{-1}H_1)^2\Omega+\frac{2}{m}H_0^{-1}H_1H_0^{-1}P_{f_{\mu}}H_0^{-1}H_1\Omega \\
&-2c_0(H_0^{-1}H_1)^2\Omega-2c_1H_0^{-1}H_1\Omega+c_2\Omega, \\
\Phi_3^{\mu}&=-\frac{6}{m}H_0^{-1}P_{f_{\mu}}(H_0^{-1}H_1)^3\Omega-\frac{6}{m}H_0^{-1}H_1H_0^{-1}P_{f_{\mu}}(H_0^{-1}H_1)^2\Omega-\frac{6}{m}(H_0^{-1}H_1)^2H_0^{-1}P_{f_{\mu}}H_0^{-1}H_1\Omega \\
&-\frac{3}{m}E_2H_0^{-1}P_{f_{\mu}}(H_0^{-1})^2H_1\Omega-\frac{3}{m}E_2(H_0^{-1})^2P_{ f_{\mu}}H_0^{-1}H_1\Omega \\
&+6c_0(H_0^{-1}H_1)^3\Omega+6c_1(H_0^{-1}H_1)^2\Omega-3c_2H_0^{-1}H_1\Omega+3c_0E_2(H_0^{-1})^2H_1\Omega+c_3\Omega.\end{align*}
%\\*
%\samepage
Substituting them into (\ref{eq:c2}), we have
\begin{align*}
&c_2(\Lambda)=-\frac{2}{3m}\{\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, H_0^{-1}P_{ f_{\mu}}(H_0^{-1}H_1)^3\Omega)+\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, H_0^{-1}H_1H_0^{-1}P_{f_{\mu}}(H_0^{-1}H_1)^2\Omega) \\
&+\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, (H_0^{-1}H_1)^2H_0^{-1}P_{ f_{\mu}}H_0^{-1}H_1\Omega)+\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1}H_1)^2\Omega, H_0^{-1}P_{ f_{\mu}}(H_0^{-1}H_1)^2\Omega) \\
& +\sum_{\mu=1}^3(P_{ f_{\mu}}(H_0^{-1}H_1)^2\Omega, H_0^{-1}H_1H_0^{-1}P_{ f_{\mu}}H_0^{-1}H_1\Omega)+\sum_{\mu=1}^3(P_{ f_{\mu}}(H_0^{-1}H_1)^3\Omega, H_0^{-1}P_{f_{\mu}}H_0^{-1}H_1\Omega) \} \\
& -\frac{E_2}{3m}\{ \sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, H_0^{-1}P_{f_{\mu}}(H_0^{-1})^2H_1\Omega)+\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, (H_0^{-1})^2P_{f_{\mu}}H_0^{-1}H_1\Omega) \\
&+\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1})^2H_1\Omega, H_0^{-1}P_{f_{\mu}}H_0^{-1}H_1\Omega) \}
+\frac{2c_0}{3}\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, (H_0^{-1}H_1)^3\Omega) \\
& +\frac{2c_1}{3}\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, (H_0^{-1}H_1)^2\Omega)-\frac{c_2}{3}\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, H_0^{-1}H_1\Omega) \\
&+\frac{c_0E_2}{3}\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, (H_0^{-1})^2H_1\Omega)+\frac{c_3}{9}\sum_{\mu=1}^3(P_{f_{\mu}}H_0^{-1}H_1\Omega, \Omega) \\
&+\frac{2c_0}{3}\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1}H_1)^2\Omega, (H_0^{-1}H_1)^2\Omega)+\frac{2c_1}{3}\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1}H_1)^2\Omega, H_0^{-1}H_1\Omega) \\
&-\frac{c_2}{3}\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1}H_1)^2\Omega, \Omega) +\frac{2c_0}{3}\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1}H_1)^3\Omega, H_0^{-1}H_1\Omega) \\
&+\frac{2c_1}{3}\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1}H_1)^3\Omega, \Omega)+\frac{c_0E_2}{3}\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1})^2H_1\Omega, H_0^{-1}H_1\Omega) \\
&+\frac{c_1E_2}{3}\sum_{\mu=1}^3(P_{f_{\mu}}(H_0^{-1})^2H_1\Omega, \Omega).
\end{align*}
\end{document}