diff --git a/bab8/contoh_081.py b/bab8/contoh_081.py
deleted file mode 100755
index 47c5182..0000000
--- a/bab8/contoh_081.py
+++ /dev/null
@@ -1,81 +0,0 @@
-#!/usr/bin/env python
-
-"""
-contoh_081.py
-
-PDP Laplace 2D
-
-SHSH <sandy.herho@email.ucr.edu>
-22/12/23
-"""
-
-import numpy as np
-import matplotlib.pyplot as plt
-plt.style.use("bmh")
-
-def inisialisasi_grid(ukuran, nilai_awal=0):
-    return np.full(ukuran, nilai_awal, dtype=float)
-
-def terapkan_kondisi_batas(U):
-    Un = 80
-    Us = 20
-    Uw = 20
-    Ue = 0
-
-    U[-1, :] = Un  # Dirichlet
-    U[0, :] = Us   # Dirichlet
-    U[:, 0] = Uw   # Dirichlet
-    U[:, -1] = Ue  # Neumann
-
-def iterasi_laplace(U, V, dxy):
-    for i in range(1, U.shape[0]-1, dxy):
-        for j in range(1, U.shape[1]-1, dxy):
-            U[i, j] = (U[i-1, j] + U[i+1, j] + U[i, j-1] + U[i, j+1]) / 4
-
-def laplace_2d():
-    # buat mesh
-    X, Y = np.meshgrid(np.arange(0, 50), np.arange(0, 50))
-
-    # inisialisasi
-    U = inisialisasi_grid((50, 50))
-    V = np.copy(U)
-
-    # kondisi - kondisi batas
-    terapkan_kondisi_batas(U)
-
-    # pengaturan iterasi
-    dxy = 1
-    imax = 1e4
-
-    # iterasi
-    ii = 0
-    while ii < imax:
-        iterasi_laplace(U, V, dxy)
-        ii += 1
-        galat = np.linalg.norm(U - V) / np.linalg.norm(U)
-
-        np.copyto(V, U)
-
-        if galat < 0.0001:
-            break
-
-    return X, Y, U
-
-def plot_kontur(X, Y, U):
-    # plot kontur
-    kontur = plt.contourf(X, Y, U, 25, cmap="coolwarm")
-
-    # menambahkan garis-garis nilai pada kontur plot
-    plt.contour(X, Y, U, colors='black', linestyles='dashed', linewidths=0.5)
-
-    # menambahkan color bar dengan label
-    colorbar = plt.colorbar(kontur, label=r'T($^\circ$C)')
-
-    # menambahkan label sumbu x dan y
-    plt.xlabel('$x$', fontsize=16)
-    plt.ylabel('$y$', fontsize=16)
-    plt.savefig("../gambar/gambar081.png", dpi=250)
-
-if __name__ == "__main__":
-    X, Y, U = laplace_2d()
-    plot_kontur(X, Y, U)
diff --git a/bab8/contoh_082.py b/bab8/contoh_082.py
deleted file mode 100644
index f5ed2ae..0000000
--- a/bab8/contoh_082.py
+++ /dev/null
@@ -1,60 +0,0 @@
-#!/usr/bin/env python
-
-"""
-contoh_081.py
-
-PDP Kuantum
-
-SHSH <sandy.herho@email.ucr.edu>
-23/12/23
-"""
-
-import numpy as np
-import matplotlib.pyplot as plt
-plt.style.use("bmh")
-
-def atur_profil_energi_potensial(x, L, V0):
-    V = np.zeros_like(x)
-    V[(x > L / 3) & (x < 2 * L / 3)] = V0
-    return V
-
-def atur_hamiltonian(jml_titik, dx, V):
-    H = np.zeros((jml_titik, jml_titik))
-    H[np.diag_indices(jml_titik)] = 2 / dx**2 + V
-    H[np.arange(1, jml_titik), np.arange(0, jml_titik - 1)] = -1 / dx**2
-    H[np.arange(0, jml_titik - 1), np.arange(1, jml_titik)] = -1 / dx**2
-    return H
-
-def main():
-    # Konstanta
-    h_bar = 1.0  # Konstanta Planck tereduksi
-    m = 1.0  # Massa partikel
-    L = 10.0  # Lebar sumur potensial
-    V0 = 50.0  # Tinggi penghalang potensial
-    jml_titik = 500  # Jumlah titik spasial
-    dx = L / (jml_titik - 1)  # Ukuran langkah spasial
-
-    # Diskritisasi koordinat spasial
-    x = np.linspace(0, L, jml_titik)
-
-    # Atur profil energi potensial
-    V = atur_profil_energi_potensial(x, L, V0)
-
-    # Atur matriks Hamiltonian
-    H = atur_hamiltonian(jml_titik, dx, V)
-
-    # Hitung eigenvalues dan eigenvectors
-    eigenvalues, eigenvectors = np.linalg.eigh(H)
-
-    # Plot energi potensial dan beberapa fungsi gelombang pertama
-    plt.plot(x, V, label='Energi Potensial')
-    for i in range(3):
-        plt.plot(x, eigenvalues[i] + eigenvectors[:, i], label=f'Mode Eigen {i+1}')
-
-    plt.xlabel('$x$', fontsize=16)
-    plt.ylabel('Energi / Fungsi Gelombang', fontsize=16)
-    plt.legend()
-    plt.savefig("../gambar/gambar082.png", dpi=250)
-
-if __name__ == "__main__":
-    main()
\ No newline at end of file
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diff --git a/gambar/gambar082.png b/gambar/gambar082.png
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